Auto detect language for spellcheck is not working.

Auto detect language for spellcheck is not working.

Hello Zoho!

I got tired of seeing my whole document underlined with red when writing in a foreign language (Spanish is the case right now) so I checked the settings and saw that the magical option "auto"(detect) was on, and even though it was already like that by default, I selected that option again and it seemed to work because the red underlined just disappeared (yei!); the problem came back when I reloaded the document and I started to see that beautiful red line under my text once again.

Am I doing something wrong? I'm using Safari (OS X Yosemite 10.10.4).

I would love to know what to do! I'll be waiting for your answer.

Thanks in advance!