Hello I have a thconfig file where I use the statement "language de"/"language en" to switch language for the output. Within the config file I use some translations like this: ... text de "point passage-height:unsigned" "Ganghöhe" ... text en "point passage-height:unsigned" "passage height" Every time I try to compile with "language de" I get an error: #################### end of metapost log file #################### converting scraps ... done C:\Program Files\Therion\therion.exe: error -- Invalid utf-8 string! writing xtherion file ... done As soon as I switch back to "language en" it does work. Therefore I'm pretty sure it is due to the special characters like 'ö'. I opened the thconfig file with an external editor (Visual Studio Code), removed the first line "encoding utf-8" and saved the file with encoding "ISO 8859-1". As soon as I open the thconfig file with XTherion and start compile the format is resetted to utf-8 and within the thconfig file the first line is replaced to "encoding utf-8" (checke this again with Visual Studio Code". And the error above is the result. Only opening the config file and closing again without any changes does change the encoding line in the config file to utf-8. I'm using Therion 6.4.0 and can't remeber when this behaviour/problem raised. I'm pretty sure some time ago this did work without error. Any help is appreciated. Thanks in advance! regards, Torsten