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[BUG] Characters å,ä and ö are replaced with � when Claude Code edit files #7335
Description
Activity
Found 3 possible duplicate issues:
- [BUG] Claude Code does not respect file encoding, corrupts Windows-1252 files #7134
- Character Encoding Handling Fails for WINDOWS-1252 ADVPL Files #3416
- Unicode/UTF-8 Character Corruption in Hook System #6246
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How are you looking at the files? Are your source files in an encoding other than utf-8? The result of editing a file with å, ä, ö seems fine to me.
> Edit @nordic_characters.txt to add more words with å, ä, ö ⎿ Read nordic_characters.txt (18 lines) ⏺ I'll add more Nordic words containing å, ä, ö to the file. ⏺ Update(nordic_characters.txt) ⎿ Updated nordic_characters.txt with 15 additions 9 - kött (meat) 10 - smörgås (sandwich) 11 - björn (bear) 12 + - hör (hear) 13 + - kök (kitchen) 14 + - förstå (understand) 15 + - älg (moose) 16 + - träd (tree) 17 + - höst (autumn) 18 + - väder (weather) 19 + - röd (red) 20 + - gå (walk/go) 21 + - hålla (hold) 22 + - öppna (open) 23 + - stänga (close) 24 + - läsa (read) 25 + - högre (higher) 26 + - föräldrar (parents) 27 28 Finnish examples: 29 - päivä (day) ⏺ Update(nordic_characters.txt) ⎿ Updated nordic_characters.txt with 6 additions 29 - päivä (day) 30 - yö (night) 31 - säätä (weather) 32 + - järvi (lake) 33 + - mäki (hill) 34 + - käsi (hand) 35 + - tähtitaivas (starry sky) 36 + - hyvää päivää (good day) 37 + - kiitos (thank you) 38 39 These characters (å, ä, ö) are commonly used in Swedish, Finnish, and other Nordic languages. 40 \ No newline at end of fileAh I see, this is on Windows + Windows Terminal. Seems related to #7332
How are you looking at the files? Are your source files in an encoding other than utf-8? The result of editing a file with å, ä, ö seems fine to me.
> Edit @nordic_characters.txt to add more words with å, ä, ö ⎿ Read nordic_characters.txt (18 lines) ⏺ I'll add more Nordic words containing å, ä, ö to the file. ⏺ Update(nordic_characters.txt) ⎿ Updated nordic_characters.txt with 15 additions 9 - kött (meat) 10 - smörgås (sandwich) 11 - björn (bear) 12 + - hör (hear) 13 + - kök (kitchen) 14 + - förstå (understand) 15 + - älg (moose) 16 + - träd (tree) 17 + - höst (autumn) 18 + - väder (weather) 19 + - röd (red) 20 + - gå (walk/go) 21 + - hålla (hold) 22 + - öppna (open) 23 + - stänga (close) 24 + - läsa (read) 25 + - högre (higher) 26 + - föräldrar (parents) 27 28 Finnish examples: 29 - päivä (day) ⏺ Update(nordic_characters.txt) ⎿ Updated nordic_characters.txt with 6 additions 29 - päivä (day) 30 - yö (night) 31 - säätä (weather) 32 + - järvi (lake) 33 + - mäki (hill) 34 + - käsi (hand) 35 + - tähtitaivas (starry sky) 36 + - hyvää päivää (good day) 37 + - kiitos (thank you) 38 39 These characters (å, ä, ö) are commonly used in Swedish, Finnish, and other Nordic languages. 40 \ No newline at end of fileThe files are closed in UTF-8 and are .cs files and I definitely think this is related to #7332
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on Jan 20, 2026
Preflight Checklist
What's Wrong?
I have the issue that when teh characters å, ä or ö exists in the source code files they are removed and replaced with a � when Claude Code edit these files.
What Should Happen?
I expect the characters å, ä and ö to be preserved when Claude Code are edit files.
Error Messages/Logs
Steps to Reproduce
Claude Model
Sonnet (default)
Is this a regression?
I don't know
Last Working Version
No response
Claude Code Version
1.0.109
Platform
Anthropic API
Operating System
Windows
Terminal/Shell
Windows Terminal
Additional Information
No response