Fun thing I found on Wiktionary is that in Georgian, /mɑmɑ/ is a word for father[1] and mother is /dɛdɑ/[2].
Add: oh, and it's "panjo" in Esperanto... :)
Other languages outside of rule may possibly include Eshtehardi, Fijian, Greenlandic, Inuktitut, Igbo, Kyrgyz, Malay, Maori, Mari, Moksha, Thai and Vietnamese (suspections per http://en.wiktionary.org/wiki/mum#Translations and http://en.wiktionary.org/wiki/mother#Translations). Personally, I've unfortunately never even heard about half of those languages, and not familiar with the ones I've heard about to the extent I can confirm or opposite.
Add: oh, and it's "panjo" in Esperanto... :)
Other languages outside of rule may possibly include Eshtehardi, Fijian, Greenlandic, Inuktitut, Igbo, Kyrgyz, Malay, Maori, Mari, Moksha, Thai and Vietnamese (suspections per http://en.wiktionary.org/wiki/mum#Translations and http://en.wiktionary.org/wiki/mother#Translations). Personally, I've unfortunately never even heard about half of those languages, and not familiar with the ones I've heard about to the extent I can confirm or opposite.
[1]: http://en.wiktionary.org/wiki/%E1%83%9B%E1%83%90%E1%83%9B%E1...
[2]: http://en.wiktionary.org/wiki/%E1%83%93%E1%83%94%E1%83%93%E1...