Thank you for writing at this Wikipedia. This is the lingala edition of Wikipedia. So, articles should be written in lingala. If you prefer to write in English: no problem, do it in the English edition of wikipedia: en.wikipedia.org.
In fact, that is the reason, why someome put a "delete" information at your articles. If you want to keep them, just start to translate them into lingala. If you are not shure about the spelling, don't worry, a spell checker is available for free: https://addons.mozilla.org/en-US/firefox/addon/lingala-spell-checker/