Nicholas Knutsen 

Go to File -> Options -> Editor -> AutoCorrect and check the settings for your target language.

Nicholas Knutsen 

Go to File -> Options -> Editor -> AutoCorrect and check the settings for your target language.

Thanks for your reply. I have nothing checked under Autocorrect. There is nothing there that would make these replacements anyway.

Sorry I wasn't more accurate. My version: Trados Studio 2022 SR2 - 17.2.11.19134

I'm on Windows 11 23H2.

Nicholas Knutsen 

Is the target language list set to your target language and still empty?

The AutoCorrect feature from Trados Studio is the one I pointed the finger as well.

If it’s not AutoCorrect, what’s the original file format? Maybe a PDF created with InDesign? InDesign has a setting to create ligatures automatically?

Yes, it's set to my target language. But there are no "fi" or "ti" or any other kind of ligature replacements in "AutoCorrect" anyway.

The original file is an Excel file. The font is Calibri. There are no ligatures in the Excel file, but when I open it in Studio, they have been inserted. And if I type in Studio, they are automatically insterted. If I type in the Excel file, nothing happens.

Nicholas Knutsen 

Could you please insert a really small sample of the Excel file? Just one cell will suffice (as long as you confirm that sample file has the issue.

Let us know the word you are trying to write in Trados Studio and the target language. I’ll try to repro the issue.

I guess you don’t have AutoHotkey or a similar program modifying keys, right?

Nicholas Knutsen 

Do you show formatting? If so, go to File -> Options -> Editor and switch to "Show all tags, but no formatting". Maybe this can help.

www.madforest.com/test.xlsx

This word, "til", has three letters in the excel file. But in Studio, "ti" will be replaced with a ligature.

Wow, that did help! Now there are no ligatures in the source view nor when I type! I would never have guessed that, thanks!