can I use spanish language to comunicate?

The question is a bit too open: with whom do you intend to communicate? If you mean organising a meeting with Spanish speaking people, sure. If you mean in this forum, English will likely get you more replies. Besides, I haven't seen an "Other languages" section but I'm too new here. It seems to be English only by the way. Same for assistance, or at least I prefer writing in English to make sure I'm understood.