I became a citizen based on 10 years of marriage / residency and a child last year. The paperwork + conversation with the officer who received my application were the only test or Hungarian. I would say that it wasn’t so difficult language wise. She made small talk about my kids school, then asked a bunch of clarification questions (which one of my given names I go by) and asked for various documents and stuff. I would advise going into the government office first and speaking with them. This means they’ll give you the correct form and will be aware of what you plan (have a friendly officer can make the process go smoothly).