sims 4 changed language, copied saves don't show up

@LennyOgg   Apologies.  I'm a little confused since I'm not able to see your save files.  Please exit the game without saving. 

You said you renamed the old file because of a conflict with an existing file name.  Is that correct?  If so, please try these steps.

- Move both the file with the conflicting name and the old file that you renamed; either to your desktop or another clean folder for testing.  Edit: Also move all the ver files for each.

- Rename the file with the conflicting name with a higher number: for example let's say the conflicting name is Slot_00000033.save maybe change it to Slot_00000050.save

- Rename the older file back to its original name; for this example you would bring back the Slot_00000033.save name for the older file

Edit 2: You'll also need to rename the .ver files

- Test to see if the old file loads properly now