Use parameters for file format encoding #15801
Description
Describe the problem
Currently there are several format variants differing in encoding. This unnecessarily expands the list of formats and often confuses users.
Solution brainstorm
As we now have #15416, the encoding should be converted to a parameter defaulting to the most used encoding for each of the file formats. Maybe it's UTF-8 these days for everything, but I'm not sure.
Some formats also support automatic detection. It allows mixed encoding translation files, so it brings a value. On the other side, it has proven to be problematic as the detection can sometimes give bad results (changing over time as the translation file is being changed). So it should probably stay, but not be the default.
Describe alternatives you have considered
No response
Screenshots
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Additional context
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