Yeah this came up ages ago. I think there's something like a 500 character limit with Bing. (I tried to find the original post, but searching here is meh...)
Amber is correct, there's a 500 character limit for translations and unfortunately, this can't be fixed from our side, since it's a limitation from Bing.
I'd recommend translating the whole page from your browser. I use Chrome and it works quite well, and dare I say, faster than the in-built one.
This is ridiculous.
No its not faster using a third party translation. Yet again more extra steps to use this forum.
Not even close to 500 words.
Unfortunately it counts characters, not words (and may include the html behind the scenes in the count, but I'm not sure)
Anyway yet another feature which does not work properly. Where does it end.