I understand the sentence "Can I take a picture with you?" in Japanese overall, but I am a bit confused as for why one can use the particle も in the sentence? What does it do?
Thanks for the help! C
It's part of the construction ～てもいいです, which expresses permission.
In this case, も isn't the same as the particle も meaning 'also' or 'same'.
source: Makino S., Tsutsui M.. (2006). A Dictionary Of Basic Japanese Grammar: 日本語基本文法辞典. Tokyo: The Japan Times, page 471-473.