I am struggling with the design of a questionnaire in a research study encompassing all fixed and dependent variables.

The works I have found are 2-language based, but my community deals with at least 4. The coexistance of more than 2 languages in the household, being one of them a heritage, minority, and non-official, is a bit overwhelming for an MA thesis student.

It is the first time that I use this platform, so I hope that my question is pertinent and properly formulated. All help or guidance will be appreciated. Thanks in advance.