I am spanish speaker too. http://goo.gl/w8OehW
Many spanish speakers buyers have some issues receiving quotations in english.
-You may ask the supplier to give you the quotation in Spanish, but if they don´t have a real spanish speaker staff, they will just translate using google and send it...this is a very bad idea!
-I recommend to recieve the quotation in english and hire a person you trust, to translate into spanish, so you will avoid in the future misunderstandings.
- If you have some problems with the goods, supplier can not argue that was spanish mistakes from you.
I also recommend to use the alibaba website in english, not spanish. Will have accurate information for deciding about purchases.
Hope this helps
You can ask them to use google translate to translate english into spanish for you. Or else you can try to find a trading company for you to resolve the problem. Hope it's helpful for you.