Yeah that's cool, happens to me a lot. I also frequently forget to add "n't", like I write "did" instead of "didn't". Weird. Sometimes I'm not sure if I wrote some English phrase right so I have to google it to make sure, even though I've used it a million times...
Like I wasn't sure if "all the rage" was an actual expression...crazy...
But yeah, I think only people who speak other languages know how difficult and rare it is for someone to reach a conversational level of proficiency in a foreign language. That's why I have to need to commend others...:\