words like "Appan","Appachan","Chaachan" (all 3 forms common among Christians, Appan is also used by Hindus of Tamil influenced areas),"Baappa/Vaappa" ,"Uppa"(both common among Muslims) etc. are also used for father, and words such as "Umma"(among Muslims), "Ammachi"(among Christians) for mother. Christians use Achan to mean Church Father."Thalla" which means mother and "Thantha" which means father are currently never used formally and are considered derogatory/disrespectful. "Thaayi" is another old and extremely uncommon word for mother. In Tamil, "thaayi" and "thanthai" are the formal Tamil words for mother and father; informally "amma" or "naina" for mother and "appa" for father are much more common. In the Kannada language, "thaayi" for mother and "thande" for father are used formally. But to address them informally Kannadigas use amma for mother and appa for father. Uralic languages Estonian ema for mother and isa for father. Hungarian apa means "father" and anya means mother, which tends to use open vowels such as and . For formal usage, these words are applied, but both mama and papa are used as well, in informal speech. For family internal addressing, apu and anyu (variants of "apa" and "anya," respectively) are also used. Finnish emä means mother, though it is archaic when applied to humans. The modern word is "äiti". Indo-European languages In the Proto-Indo-European language, *mā́tēr (modern reconstruction: *méh₂tēr) meant "mother" while *pǝtḗr (modern reconstruction: *ph₂tḗr) and átta meant "father". Romance Catalan mamà / mama and papà / papa French maman / papa (mother / father) and mamie / papy (grandmother / grandfather) Galician nai, mai / pai Italian mamma and papà or babbo Lombard mader Portuguese mãe / pai (mother / father); Portugal: mamã / papá; Brazil: mamãe / papai Romanian mama / mamă (mother) and tata / tată (father) Sardinian mama and babbu Spanish mamá and papá Balto-Slavic Belarusian мама (mama) for mom and тата (tata) for dad. Bulgarian мама (mama) for mom and татко (tatko) for dad; майка (maika) for mother and баща (bashta) for father; баба (baba) for grandmother and дядо (dyado) for grandfather. For aunt and uncle: стринка (strinka) for father's brother's wife and чичо (chicho) for father's brother / вуйна (vuyna) for mother's brother's wife and вуйчо (vuycho) for mother's brother. Czech máma and táta Lithuanian mama Rusyn мама (mama) for mom and татo (tato) for dad. Polish mama and tata Russian мама (mama). In Russian papa, deda and baba mean "father", "grandfather" and