As someone who has grown up in Delhi and has been living in Germany for the past 7 years, I am the perfect candidate for your assignment. My english language skills are flawless and so is my German (native speaker level for both).
I have completed my studies in the German language and am currently working in a German speaking company. I am aware of the phrases and slangs of both the languages, and can incorporate them in the document, if required. I have been translating documents for quite some time now, and believe that you will be satisfied with the quality of work provided by me.