Subtitles size

[CrazyPortuguese]

Anyone knows how much CVD subtitles would ocupie in a 2 hour movie?
I'm asking this because I've always set to have portuguese subtitles but I'm thinking in having english subtitles too would be great to practice my english but would that spend to much preciouse space and decrease the video quality a lot?

Thanks

[Mozart]

each one subtitle stream has a size between 1MB and 3MB. So, it won't decreases the video quality. It is possible to add up to 4 subtitles streams.

[CrazyPortuguese]

Great :)
Thanks Mozart :)