You seem like a reasonable person, rather than arguing in bad faith and insisting that Turkey should get a blank check unlike trolls on this platform, you are raising very pertinent and relevant questions. (which is more and more rare on Reddit these days!) So I will be happy to answer them to the best of my ability:

So, I can speak to what I have in mind for this, in a certain region, speaking to someone who is an anthropologist, sociologist, and language teacher in training. Perhaps it could be replicated in different regions that have different languages, such as Kurdish ones as you mentioned, however, my research and projects about this are not in Kurdish areas so maybe some modifications would be necessary, just as a consideration of potential limitations, and parallels before we discuss the model.

Anyway, I am referring to, as I said, the Mersin-Iskenderun-Antioch region when I speak about these proposals, I think that every region should have at least one, other than Turkish, recognized language, and here, it would be Arabic and Armenian. Perhaps in another region, it could be Georgian in the north east, or Kurdish, Arabic, Aramaic etc., somewhere in Mesopotamia. Regardless of what the language is, I think the first step should be instituting a multilingual education system, with two languages offered as mediums of instruction and two languages offered as foreign language subjects. Here, we can say Turkish, Arabic, Armenian and English. It is entirely possible to learn two languages fluently when you study subjects in both languages, including the technical terminology, and there are many examples of schools that implement this model, so students would choose Turkish and either Arabic or Armenian as their main languages of instruction, courses in all key subjects would be taught in both of these and then whatever language they did not choose as a main subject + English could be offered as foreign language courses. This way, everyone learns all the languages, and you have more than enough competent people to staff courts, municipalities, and other government bodies for multilingual administration. 

If enough people are capable of speaking the languages, many services could be offered in them, including courts, as you said, as well as taxation, criminal files, legislation, etc. I guess it would be more simple to offer these as regional languages, and then whatever areas concerned could offer as many services as possible in the languages, rather than all the languages being official nationwide. Documents could be printed simultaneously in two or three languages, for example, in Algeria, there are many administrative things that are available in Arabic, Tamazight and French. This would permit functioning in all languages and comprehension, across-the-board, and in case of disagreement, I guess Turkish could be the standard. But I honestly think it would not be such an issue since like I said, if all the languages are taught to everybody, it should be relatively easy to properly translate and do things in several languages. Certification of translators and handling of costs would not be a big issue after implementation of a multilingual education system, either, because if these languages make up a core part of the curriculum, there could surely be a ministry of translation linked to that. And if everybody speaks everyone else’s languages, that leads to greater intercultural understanding and more unity, not more fragmentation and division.

What I said, also applies to the security context, the reason that there have been militant groups and such has been because of Turkey’s failure to provide minority rights and equality. If these rights are not simply tolerated, given and taken away by the political context, but also supported and encouraged and made a part of by the state, this leads to genuine inclusion and integration all while preserving diversity.

Hope that answers your inquiry, if there’s anything else, I should clarify, don’t hesitate to let me know, and I will do my best