12. "hahahahaha" and "hehehehehe" — English and other languages
11. "hihihihihihihihi" — Vietnamese (and other languages)
10. "55555555555" — Thai
9. "wwww" — Japanese
8. "חחח/ההה" (khkhkhkhkhkhkhkhkh) — Hebrew
7. "xaxaxaxa" — Greek
6. "wakakakakaka" or "wkwkwkwkwk" — Indonesia
5. "huehuehue" — Brazillian Portuguese
4. "kekekekekekeke" - Korean
3. “rsrsrs,” “hashuashuashuashua,” “rá!,” and “kkkkk” — Portuguese
1. "jajajajajaja" — Spanish
Sourcing: This reddit thread, How To Say LOL In 14 Different Languages and How The World Laughs on the Web.