How do I say 'LOL' in russian?
The most obvious translation is just "лол".
Also, there are some malformed options: "лал", "лел", "лiл", but they are not common, and I would not give advice to use them
There exist a good analogue - "ржунимагу" (I can't stop laughing)
You can find other analogues there: https://lurkmore.to/LOL
• The most adequate Russian analog of 'LOL' is ржунимагý which is the phonetic spelling of ржу, не могу, '[I'm] nickering (literary 'neighing'), cannot [stop]'.
• Another one is пацталóм (= под столом), '[laughing having fallen] under the table'.
• One more variant is бгг! which is a contracted way of writing бу-га-гá!, onomatopoeia that imitates laughing out loud.
Here is an article about 'LOL' on Lurkmore, a Russian Internet memes wiki.
you can say anything with word ржу (ржать, ржачный, угараю, угарать, угар, угарный), adding necessary definitions on a thing you are laughing about.
"Вот это угар" - this is for real (LOL)
"Угараю (не могу)" - cracking, can't help myself
"Оборжаться" - yeah, LOL
"Ржачный прикол" ~ that's awesome (gag, prank), this (gag, prank is) awesome
and some other, you can catch them in chat