Why can’t I specify several mother tongues?

For quality reasons, you can select only one language as your mother tongue. We are aware that some translators come from multilingual backgrounds, but we ask you to choose the language you feel most comfortable writing in and translating into.
Please note that being fluent/bilingual in a language does not mean that it is your native language.
Once you have chosen your mother tongue, you will not be able to change it.