UPDATE: update new language patch

frontend/bindings/firefly-launcher/internal/languageservice.js

@@ -8,7 +8,7 @@ import {Call as $Call, Create as $Create} from "@wailsio/runtime";
 
 /**
  * @param {string} path
- * @returns {Promise<[string, string]> & { cancel(): void }}
+ * @returns {Promise<[boolean, string, string, string]> & { cancel(): void }}
  */
 export function GetLanguage(path) {
     let $resultPromise = /** @type {any} */($Call.ByID(3450750492, path));
@@ -19,7 +19,7 @@ export function GetLanguage(path) {
  * @param {string} path
  * @param {string} text
  * @param {string} voice
- * @returns {Promise<boolean> & { cancel(): void }}
+ * @returns {Promise<[boolean, string]> & { cancel(): void }}
  */
 export function SetLanguage(path, text, voice) {
     let $resultPromise = /** @type {any} */($Call.ByID(2793672496, path, text, voice));

frontend/src/pages/language/index.tsx

@@ -27,28 +27,42 @@ export default function LanguagePage() {
 
     useEffect(() => {
         const getLanguage = async () => {
-            if (gameDir) {
-                const subPath = 'StarRail_Data/StreamingAssets/DesignData/Windows'
-                const fullPath = `${gameDir}/${subPath}`
+            if (!gameDir) return
 
-                const exists = await FSService.DirExists(fullPath)
-                if (exists) {
-                    const [textLang, voiceLang] = await LanguageService.GetLanguage(fullPath)
-                    setTextLang(textLang)
-                    setVoiceLang(voiceLang)
-                    setFolderCheckResult('success')
-                    setSelectedTextLang(textLang)
-                    setSelectedVoiceLang(voiceLang)
-                } else {
-                    setTextLang('')
-                    setVoiceLang('')
-                    setSelectedTextLang('')
-                    setSelectedVoiceLang('')
-                    setFolderCheckResult('error')
-                    setGameDir('')
-                }
+            const subPath = "StarRail_Data/StreamingAssets"
+            const fullPath = `${gameDir}/${subPath}`
+
+            const exists = await FSService.DirExists(fullPath)
+            if (!exists) {
+                setTextLang("")
+                setVoiceLang("")
+                setSelectedTextLang("")
+                setSelectedVoiceLang("")
+                setFolderCheckResult("error")
+                setGameDir("")
+                return
             }
+
+            const [ok, textLang, voiceLang, err] = await LanguageService.GetLanguage(fullPath)
+            if (!ok) {
+                setTextLang("")
+                setVoiceLang("")
+                setSelectedTextLang("")
+                setSelectedVoiceLang("")
+                setFolderCheckResult("error")
+                setGameDir("")
+                toast.error(err)
+                return
+            }
+
+            // success
+            setTextLang(textLang)
+            setVoiceLang(voiceLang)
+            setFolderCheckResult("success")
+            setSelectedTextLang(textLang)
+            setSelectedVoiceLang(voiceLang)
         }
+
         getLanguage()
     }, [gameDir])
 
@@ -86,19 +100,19 @@ export default function LanguagePage() {
         }
         try {
             setIsSettingLanguage(true)
-            const result = await LanguageService.SetLanguage(
+            const [ok, err] = await LanguageService.SetLanguage(
                 `${gameDir}/StarRail_Data/StreamingAssets/DesignData/Windows`,
                 selectedTextLang,
                 selectedVoiceLang
             )
-           if (result) {
-            toast.success('Language set successfully')
-            setTextLang(selectedTextLang)
-            setVoiceLang(selectedVoiceLang)
-           }
-           else {
-            toast.error('Language set failed')
-           }
+            if (ok) {
+                toast.success('Language set successfully')
+                setTextLang(selectedTextLang)
+                setVoiceLang(selectedVoiceLang)
+            }
+            else {
+                toast.error(err)
+            }
 
         } catch (err: any) {
             toast.error('SetLanguage error:', err)
@@ -154,8 +168,8 @@ export default function LanguagePage() {
                             </div>
                             {folderCheckResult && (
                                 <div className={`flex items-center gap-2 p-3 rounded-lg ${folderCheckResult === 'success'
-                                        ? 'bg-success/5 text-success border border-success'
-                                        : 'bg-error/5 text-error border border-error'
+                                    ? 'bg-success/5 text-success border border-success'
+                                    : 'bg-error/5 text-error border border-error'
                                     }`}>
                                     {folderCheckResult === 'success' ? (
                                         <>

internal/language-service.go

@@ -2,145 +2,174 @@ package internal
 
 import (
 	"bytes"
-	"fmt"
+	assetMeta "firefly-launcher/pkg/language-patch/asset-meta"
+	excelLanguage "firefly-launcher/pkg/language-patch/excel-language"
+	"firefly-launcher/pkg/models"
 	"os"
 	"path/filepath"
+	"slices"
+	"strings"
 )
 
 type LanguageService struct{}
 
 func isValidLang(lang string) bool {
 	valid := []string{"en", "jp", "cn", "kr"}
-	for _, v := range valid {
-		if lang == v {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(valid, lang)
 }
 
-func (l *LanguageService) GetLanguage(path string) (string, string, error) {
-	files, err := os.ReadDir(path)
+func (l *LanguageService) GetLanguage(path string) (bool, string, string, string) {
+	currentVersionGame, err := models.ParseBinaryVersion(filepath.Join(path, "BinaryVersion.bytes"))
 	if err != nil {
-		return "", "", err
+		return false, "", "", err.Error()
 	}
 
-	for _, file := range files {
-		filePath := filepath.Join(path, file.Name())
-
-		content, err := os.ReadFile(filePath)
-		if err != nil {
-			continue
-		}
-
-		patternToFind := []byte("SpriteOutput/UI/Fonts/RPG_CN.ttf")
-		idx := bytes.Index(content, patternToFind)
-		if idx == -1 {
-			continue
-		}
-
-		pattern := []byte("Korean")
-		idx = bytes.Index(content, pattern)
-		if idx == -1 {
-			continue
-		}
-
-		// Move to os text language
-		idx += 10
-		idx += 4
-		osText := string(content[idx : idx+2])
-		idx += 3 * 4 
-
-		// Move to cn voice language
-		idx += 1
-		idx += 5
-		cnVoice := string(content[idx : idx+2])
-		idx += 3 * 2 // skip 2 entries
-
-		// Move to os voice language
-		idx += 1
-		idx += 5
-		osVoice := string(content[idx : idx+2])
-		idx += 3 * 5 // skip 5 entries
-
-		// Move to cn text language
-		idx += 1
-		idx += 4
-		cnText := string(content[idx : idx+2])
-
-		textLang := osText
-		voiceLang := osVoice
-		if !isValidLang(textLang) {
-			textLang = cnText
-		}
-		if !isValidLang(voiceLang) {
-			voiceLang = cnVoice
-		}
-
-		return textLang, voiceLang, nil
+	typeVersionGame := "os"
+	if strings.Contains(currentVersionGame.Name, "CN") {
+		typeVersionGame = "cn"
 	}
 
-	return "", "", fmt.Errorf("couldn't find file to read language from")
-}
+	assetPath := filepath.Join(path, "DesignData\\Windows")
 
-func replaceBytes(content []byte, idx int, choice string, param int) int {
-	for i := 0; i < param; i++ {
-		copy(content[idx:idx+2], []byte(choice))
-		idx += 3
-	}
-	return idx
-}
-
-func (l *LanguageService) SetLanguage(path string, text, voice string) (bool, error) {
-	files, err := os.ReadDir(path)
+	indexHash, err := assetMeta.GetIndexHash(assetPath)
 	if err != nil {
-		return false, err
+		return false, "", "", err.Error()
 	}
 
-	for _, file := range files {
-		filePath := filepath.Join(path, file.Name())
-
-		content, err := os.ReadFile(filePath)
-		if err != nil {
-			continue
-		}
-
-		patternToFind := []byte("SpriteOutput/UI/Fonts/RPG_CN.ttf")
-		idx := bytes.Index(content, patternToFind)
-		if idx == -1 {
-			continue
-		}
-
-		pattern := []byte("Korean")
-		idx = bytes.Index(content, pattern)
-		if idx == -1 {
-			continue
-		}
-
-		idx += 10
-		idx += 4
-		idx = replaceBytes(content, idx, text, 4)
-		idx += 1
-
-		idx += 5
-		idx = replaceBytes(content, idx, voice, 2)
-		idx += 1
-
-		idx += 5
-		idx = replaceBytes(content, idx, voice, 5)
-
-		idx += 1
-
-		idx += 4
-		_ = replaceBytes(content, idx, text, 2)
-
-		err = os.WriteFile(filePath, content, 0644)
-		if err != nil {
-			return false, err
-		}
-
-		return true, nil
+	DesignIndex, err := assetMeta.DesignIndexFromBytes(assetPath, indexHash)
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+	dataEntry, fileEntry, err := DesignIndex.FindDataAndFileByTarget(-515329346)
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+	allowedLanguage := excelLanguage.NewExcelLanguage(assetPath, &dataEntry, &fileEntry)
+	languageRows, err := allowedLanguage.Parse()
+	if err != nil {
+		return false, "", "", err.Error()
 	}
 
-	return false, fmt.Errorf("couldn't find file to patch. Make sure this file is placed in the correct folder")
+	currentTextLang := ""
+	currentVoiceLang := ""
+
+	pairs := []struct {
+		area string
+		typ  *uint8
+	}{
+		{"os", nil},
+		{"cn", func() *uint8 { v := uint8(1); return &v }()},
+		{"os", func() *uint8 { v := uint8(1); return &v }()},
+		{"cn", nil},
+	}
+	
+	for _, p := range pairs {
+		var found *excelLanguage.LanguageRow
+		for i := range languageRows {
+			if languageRows[i].Area != nil && *languageRows[i].Area == p.area {
+				if (languageRows[i].Type == nil && p.typ == nil) ||
+					(languageRows[i].Type != nil && p.typ != nil && *languageRows[i].Type == *p.typ) {
+					found = &languageRows[i]
+					break
+				}
+			}
+		}
+		if found == nil {
+			continue
+		}
+		if found.DefaultLanguage != nil && found.Area != nil && *found.Area == typeVersionGame && found.Type == nil {
+			currentTextLang = *found.DefaultLanguage
+		}
+		if found.DefaultLanguage != nil && found.Area != nil && *found.Area == typeVersionGame && found.Type != nil {
+			currentVoiceLang = *found.DefaultLanguage
+		}
+	}
+
+	if currentTextLang == "" || currentVoiceLang == "" || !isValidLang(currentTextLang) || !isValidLang(currentVoiceLang) {
+		return false, "", "", "not found language"
+	}
+	
+	return true, currentTextLang, currentVoiceLang, ""
+}
+
+
+
+func (l *LanguageService) SetLanguage(path string, text, voice string) (bool, string) {
+	indexHash, err := assetMeta.GetIndexHash(path)
+	if err != nil {
+		return false, err.Error()
+	}
+
+	DesignIndex, err := assetMeta.DesignIndexFromBytes(path, indexHash)
+	if err != nil {
+		return false, err.Error()
+	}
+	dataEntry, fileEntry, err := DesignIndex.FindDataAndFileByTarget(-515329346)
+	if err != nil {
+		return false, err.Error()
+	}
+	allowedLanguage := excelLanguage.NewExcelLanguage(path, &dataEntry, &fileEntry)
+	languageRows, err := allowedLanguage.Parse()
+	if err != nil {
+		return false, err.Error()
+	}
+
+	pairs := []struct {
+		area string
+		typ  *uint8
+		lang string
+	}{
+		{"os", nil, text},
+		{"cn", func() *uint8 { v := uint8(1); return &v }(), voice},
+		{"os", func() *uint8 { v := uint8(1); return &v }(), voice},
+		{"cn", nil, text},
+	}
+	
+	for _, p := range pairs {
+		var found *excelLanguage.LanguageRow
+		for i := range languageRows {
+			if languageRows[i].Area != nil && *languageRows[i].Area == p.area {
+				if (languageRows[i].Type == nil && p.typ == nil) ||
+					(languageRows[i].Type != nil && p.typ != nil && *languageRows[i].Type == *p.typ) {
+					found = &languageRows[i]
+					break
+				}
+			}
+		}
+		if found == nil {
+			continue
+		}
+	
+		found.DefaultLanguage = &p.lang
+		found.LanguageList = []string{p.lang}
+	}
+	
+	data, err := allowedLanguage.Unmarshal(languageRows)
+	if err != nil {
+		return false, err.Error()
+	}
+	
+	filePath := filepath.Join(path, fileEntry.FileByteName+".bytes")
+	
+	f, err := os.OpenFile(filePath, os.O_RDWR, 0644)
+	if err != nil {
+		return false, err.Error()
+	}
+	defer f.Close()
+	
+	if _, err := f.Seek(int64(dataEntry.Offset), 0); err != nil {
+		return false, err.Error()
+	}
+	if _, err := f.Write(data); err != nil {
+		return false, err.Error()
+	}
+	
+	if len(data) < int(dataEntry.Size) {
+		remaining := int(dataEntry.Size) - len(data)
+		zeros := bytes.Repeat([]byte{0}, remaining)
+		if _, err := f.Write(zeros); err != nil {
+			return false, err.Error()
+		}
+	}
+	return true, "success"
 }

pkg/constant/constant.go

@@ -11,7 +11,7 @@ const LauncherFile = "firefly-launcher.exe"
 const TempUrl = "./temp"
 
 
-const CurrentLauncherVersion = "1.3.0"
+const CurrentLauncherVersion = "1.4.0"
 
 type ToolFile string
 

pkg/language-patch/asset-meta/bytehash16.go

@@ -0,0 +1,30 @@
+package assetMeta
+
+import (
+	"fmt"
+	"io"
+)
+
+type ByteHash16 []byte
+
+func ByteHash16FromBytes(r io.ReadSeeker) (ByteHash16, error) {
+	fullHash := make([]byte, 16)
+	buf := make([]byte, 4)
+	for i := 0; i < 4; i++ {
+		if _, err := io.ReadFull(r, buf); err != nil {
+			return nil, err
+		}
+		for j := 0; j < 4; j++ {
+			fullHash[i*4+j] = buf[3-j]
+		}
+	}
+	return ByteHash16(fullHash), nil
+}
+
+func (b ByteHash16) String() string {
+	s := ""
+	for _, v := range b {
+		s += fmt.Sprintf("%02x", v)
+	}
+	return s
+}

pkg/language-patch/asset-meta/dataEntry.go

@@ -0,0 +1,28 @@
+package assetMeta
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+type DataEntry struct {
+	NameHash int32
+	Size     uint32
+	Offset   uint32
+}
+
+func DataEntryFromBytes(r io.Reader) (*DataEntry, error) {
+	var d DataEntry
+
+	if err := binary.Read(r, binary.BigEndian, &d.NameHash); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(r, binary.BigEndian, &d.Size); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(r, binary.BigEndian, &d.Offset); err != nil {
+		return nil, err
+	}
+
+	return &d, nil
+}

pkg/language-patch/asset-meta/designIndex.go

@@ -0,0 +1,98 @@
+package assetMeta
+
+import (
+	"bytes"
+	"encoding/binary"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+
+type DesignIndex struct {
+	UnkI64          int64
+	FileCount       int32
+	DesignDataCount int32
+	FileList        []FileEntry
+}
+
+
+
+func (d *DesignIndex) FindDataAndFileByTarget(target int32) (DataEntry, FileEntry, error) {
+	for _, file := range d.FileList {
+		for _, entry := range file.DataEntries {
+			if entry.NameHash == target {
+				return entry, file, nil
+			}
+		}
+	}
+	return DataEntry{}, FileEntry{}, errors.New("not found")
+}
+
+
+func DesignIndexFromBytes(assetFolder string, indexHash string) (*DesignIndex, error) {
+	path := filepath.Join(assetFolder, fmt.Sprintf("DesignV_%s.bytes", indexHash))
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	r := bytes.NewReader(data)
+
+	var d DesignIndex
+
+	if err := binary.Read(r, binary.BigEndian, &d.UnkI64); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(r, binary.BigEndian, &d.FileCount); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(r, binary.BigEndian, &d.DesignDataCount); err != nil {
+		return nil, err
+	}
+
+	d.FileList = make([]FileEntry, 0, d.FileCount)
+	for i := int32(0); i < d.FileCount; i++ {
+		entry, err := FileEntryFromBytes(r)
+		if err != nil {
+			return nil, err
+		}
+		d.FileList = append(d.FileList, *entry)
+	}
+
+	return &d, nil
+}
+
+
+func GetIndexHash(assetFolder string) (string, error) {
+	path := filepath.Join(assetFolder, "M_DesignV.bytes")
+
+	f, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	_, err = f.Seek(0x1C, 0)
+	if err != nil {
+		return "", err
+	}
+
+	hash := make([]byte, 0x10)
+	index := 0
+	for i := 0; i < 4; i++ {
+		chunk := make([]byte, 4)
+		_, err := f.Read(chunk)
+		if err != nil {
+			return "", err
+		}
+
+		for bytePos := 3; bytePos >= 0; bytePos-- {
+			hash[index] = chunk[bytePos]
+			index++
+		}
+	}
+
+	return hex.EncodeToString(hash), nil
+}

pkg/language-patch/asset-meta/fileEntry.go

@@ -0,0 +1,63 @@
+package assetMeta
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+)
+
+type FileEntry struct {
+	NameHash       int32
+	FileByteName   string
+	Size           int64
+	DataCount      int32
+	DataEntries    []DataEntry
+	Unk            uint8
+}
+
+func FileEntryFromBytes(r io.Reader) (*FileEntry, error) {
+	var f FileEntry
+
+	if err := binary.Read(r, binary.BigEndian, &f.NameHash); err != nil {
+		return nil, err
+	}
+
+	buf := make([]byte, 16)
+	if _, err := io.ReadFull(r, buf); err != nil {
+		return nil, err
+	}
+	f.FileByteName = toHex(buf)
+
+	if err := binary.Read(r, binary.BigEndian, &f.Size); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(r, binary.BigEndian, &f.DataCount); err != nil {
+		return nil, err
+	}
+
+	f.DataEntries = make([]DataEntry, 0, f.DataCount)
+	for i := int32(0); i < f.DataCount; i++ {
+		entry, err := DataEntryFromBytes(r)
+		if err != nil {
+			return nil, err
+		}
+		f.DataEntries = append(f.DataEntries, *entry)
+	}
+
+	// read 1 byte
+	b := make([]byte, 1)
+	if _, err := r.Read(b); err != nil {
+		return nil, err
+	}
+	f.Unk = b[0]
+
+	return &f, nil
+}
+
+func toHex(buf []byte) string {
+	s := ""
+	for _, b := range buf {
+		s += fmt.Sprintf("%02x", b)
+	}
+	return s
+}

pkg/language-patch/asset-meta/miniAsset.go

@@ -0,0 +1,32 @@
+package assetMeta
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+type MiniAsset struct {
+	RevisionID      uint32
+	DesignIndexHash ByteHash16
+}
+
+func MiniAssetFromBytes(r io.ReadSeeker) (*MiniAsset, error) {
+	if _, err := r.Seek(6*4, io.SeekCurrent); err != nil {
+		return nil, err
+	}
+
+	var revID uint32
+	if err := binary.Read(r, binary.LittleEndian, &revID); err != nil {
+		return nil, err
+	}
+
+	hash, err := ByteHash16FromBytes(r)
+	if err != nil {
+		return nil, err
+	}
+
+	return &MiniAsset{
+		RevisionID:      revID,
+		DesignIndexHash: hash,
+	}, nil
+}

pkg/language-patch/excel-language/patch.go

@@ -0,0 +1,114 @@
+package excelLanguage
+
+import (
+	"bytes"
+	assetMeta "firefly-launcher/pkg/language-patch/asset-meta"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+type ExcelLanguage struct {
+	AssetFolder    string
+	ExcelDataEntry *assetMeta.DataEntry
+	ExcelFileEntry *assetMeta.FileEntry
+}
+
+func NewExcelLanguage(assetFolder string, dataEntry *assetMeta.DataEntry, fileEntry *assetMeta.FileEntry) *ExcelLanguage {
+	return &ExcelLanguage{
+		AssetFolder:    assetFolder,
+		ExcelDataEntry: dataEntry,
+		ExcelFileEntry: fileEntry,
+	}
+}
+
+func (a *ExcelLanguage) Unmarshal(rows []LanguageRow) ([]byte, error) {
+	buf := new(bytes.Buffer)
+
+	buf.WriteByte(0)
+	if err := writeI8Varint(buf, int8(len(rows))); err != nil {
+		return nil, err
+	}
+
+	for _, row := range rows {
+		rowData, err := row.Unmarshal()
+		if err != nil {
+			return nil, err
+		}
+		if _, err := buf.Write(rowData); err != nil {
+			return nil, err
+		}
+	}
+
+	return buf.Bytes(), nil
+}
+
+func (a *ExcelLanguage) Parse() ([]LanguageRow, error) {
+	excelPath := filepath.Join(a.AssetFolder, a.ExcelFileEntry.FileByteName+".bytes")
+
+	f, err := os.Open(excelPath)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	if _, err := f.Seek(int64(a.ExcelDataEntry.Offset), io.SeekStart); err != nil {
+		return nil, err
+	}
+
+	buffer := make([]byte, a.ExcelDataEntry.Size)
+	if _, err := io.ReadFull(f, buffer); err != nil {
+		return nil, err
+	}
+
+	reader := bytes.NewReader(buffer)
+
+	_, _ = reader.ReadByte() // skip first byte
+	count, err := readI8Varint(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	rows := make([]LanguageRow, 0, count)
+	for i := 0; i < count; i++ {
+		bitmask, err := reader.ReadByte()
+		if err != nil {
+			return nil, err
+		}
+
+		row := LanguageRow{}
+
+		if bitmask&(1<<0) != 0 {
+			s, err := readString(reader)
+			if err != nil {
+				return nil, err
+			}
+			row.Area = &s
+		}
+		if bitmask&(1<<1) != 0 {
+			t, err := reader.ReadByte()
+			if err != nil {
+				return nil, err
+			}
+			row.Type = &t
+		}
+		if bitmask&(1<<2) != 0 {
+			arr, err := readStringArray(reader)
+			if err != nil {
+				return nil, err
+			}
+			row.LanguageList = arr
+		}
+		if bitmask&(1<<3) != 0 {
+			s, err := readString(reader)
+			if err != nil {
+				return nil, err
+			}
+			row.DefaultLanguage = &s
+		}
+
+		rows = append(rows, row)
+	}
+
+	return rows, nil
+}

pkg/language-patch/excel-language/row.go

@@ -0,0 +1,81 @@
+package excelLanguage
+
+import (
+	"bytes"
+	"errors"
+)
+
+type LanguageRow struct {
+	Area            *string
+	Type            *uint8
+	LanguageList    []string
+	DefaultLanguage *string
+}
+
+func (r *LanguageRow) Unmarshal() ([]byte, error) {
+	buf := new(bytes.Buffer)
+
+	var bitmask uint8
+	if r.Area != nil {
+		bitmask |= 1 << 0
+	}
+	if r.Type != nil {
+		bitmask |= 1 << 1
+	}
+	if len(r.LanguageList) > 0 {
+		bitmask |= 1 << 2
+	}
+	if r.DefaultLanguage != nil {
+		bitmask |= 1 << 3
+	}
+
+	if err := buf.WriteByte(bitmask); err != nil {
+		return nil, err
+	}
+
+	if r.Area != nil {
+		if err := writeString(buf, *r.Area); err != nil {
+			return nil, err
+		}
+	}
+	if r.Type != nil {
+		if err := buf.WriteByte(*r.Type); err != nil {
+			return nil, err
+		}
+	}
+	if len(r.LanguageList) > 0 {
+		if err := writeStringArray(buf, r.LanguageList); err != nil {
+			return nil, err
+		}
+	}
+	if r.DefaultLanguage != nil {
+		if err := writeString(buf, *r.DefaultLanguage); err != nil {
+			return nil, err
+		}
+	}
+
+	return buf.Bytes(), nil
+}
+
+func writeString(buf *bytes.Buffer, s string) error {
+	if len(s) > 255 {
+		return errors.New("string too long")
+	}
+	if err := buf.WriteByte(uint8(len(s))); err != nil {
+		return err
+	}
+	_, err := buf.Write([]byte(s))
+	return err
+}
+
+func writeStringArray(buf *bytes.Buffer, arr []string) error {
+	if err := writeI8Varint(buf, int8(len(arr))); err != nil {
+		return err
+	}
+	for _, s := range arr {
+		if err := writeString(buf, s); err != nil {
+			return err
+		}
+	}
+	return nil
+}

pkg/language-patch/excel-language/utils.go

@@ -0,0 +1,53 @@
+package excelLanguage
+
+import (
+	"bytes"
+	"encoding/binary"
+	"io"
+)
+
+func writeI8Varint(buf *bytes.Buffer, v int8) error {
+	uv := uint64((uint32(v) << 1) ^ uint32(v>>7)) // zigzag encode
+	b := make([]byte, binary.MaxVarintLen64)
+	n := binary.PutUvarint(b, uv)
+	_, err := buf.Write(b[:n])
+	return err
+}
+
+func readI8Varint(r *bytes.Reader) (int, error) {
+	uv, err := binary.ReadUvarint(r)
+	if err != nil {
+		return 0, err
+	}
+	// zigzag decode
+	v := int((uv >> 1) ^ uint64((int64(uv&1)<<63)>>63))
+	return v, nil
+}
+
+func readString(r *bytes.Reader) (string, error) {
+	l, err := r.ReadByte()
+	if err != nil {
+		return "", err
+	}
+	buf := make([]byte, l)
+	if _, err := io.ReadFull(r, buf); err != nil {
+		return "", err
+	}
+	return string(buf), nil
+}
+
+func readStringArray(r *bytes.Reader) ([]string, error) {
+	length, err := readI8Varint(r)
+	if err != nil {
+		return nil, err
+	}
+	arr := make([]string, 0, length)
+	for i := 0; i < length; i++ {
+		s, err := readString(r)
+		if err != nil {
+			return nil, err
+		}
+		arr = append(arr, s)
+	}
+	return arr, nil
+}

pkg/models/binary-version.go

@@ -4,11 +4,13 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"regexp"
 	"strconv"
 	"strings"
 )
 
 type BinaryVersion struct {
+	Name string
 	Major int
 	Minor int
 	Patch int
@@ -22,42 +24,47 @@ func ParseBinaryVersion(path string) (*BinaryVersion, error) {
 
 	content := string(data)
 
-	dashPos := strings.LastIndex(content, "-")
-	if dashPos == -1 {
+	lastDash := strings.LastIndex(content, "-")
+	if lastDash == -1 {
 		return nil, errors.New("no dash found in version string")
 	}
-
-	start := dashPos - 6
-	if start < 0 {
-		start = 0
+	
+	secondLastDash := strings.LastIndex(content[:lastDash], "-")
+	if secondLastDash == -1 {
+		return nil, errors.New("only one dash found in version string")
 	}
 
-	versionSlice := content[start:]
-	end := strings.Index(versionSlice, "-")
-	if end == -1 {
-		end = len(versionSlice)
-	}
-
-	versionStr := versionSlice[:end]
-	parts := strings.SplitN(versionStr, ".", 3)
-	if len(parts) != 3 {
+	versionSlice := content[secondLastDash+1 : lastDash]
+	re := regexp.MustCompile(`^([A-Za-z]+)([\d\.]+)$`)
+	matches := re.FindStringSubmatch(versionSlice)
+	if len(matches) < 3 {
 		return nil, errors.New("invalid version format")
 	}
+	binaryVersion := BinaryVersion{
+		Name: matches[1],
+	}
+	numbers := strings.Split(matches[2], ".")
 
-	major, err := strconv.Atoi(parts[0])
-	if err != nil {
-		return nil, err
+	if len(numbers) > 0 {
+		binaryVersion.Major, err = strconv.Atoi(numbers[0])
+		if err != nil {
+			return nil, err
+		}
 	}
-	minor, err := strconv.Atoi(parts[1])
-	if err != nil {
-		return nil, err
+	if len(numbers) > 1 {
+		binaryVersion.Minor, err = strconv.Atoi(numbers[1])
+		if err != nil {
+			return nil, err
+		}
 	}
-	patch, err := strconv.Atoi(parts[2])
-	if err != nil {
-		return nil, err
+	if len(numbers) > 2 {
+		binaryVersion.Patch, err = strconv.Atoi(numbers[2])
+		if err != nil {
+			return nil, err
+		}
 	}
 
-	return &BinaryVersion{major, minor, patch}, nil
+	return &binaryVersion, nil
 }
 
 func (v *BinaryVersion) String() string {