In Bengali, both fathers are and mothers, . Bengali has / for brother and / for brother-in-law; for son and for son-in-law. Spanish and Portuguese contrast "brother" with "brother-in-law" ("/", "/"); "son" with "son-in-law" ("/", "/"), and similarly for female relatives like "sister-in-law" ("/") and "daughter-in-law" ("/"). Both languages use "" (Sp.) or "/" (varying by dialect), as the relationship between two men that marry siblings (or two women, using the feminine "/" instead). In the English language this relationship would be lumped in with "/" (sibling's husband or spouse's brother) as simply "brother-in-law". This distinction is reflected also in Italian, with for a brother, for a brother in law; etc. In Latin, the distinction between children and children-in-law is also present, with for one's child, for one's spouse's child that is not ours, (and in feminine) for one's child's spouse. Serbian and Bosnian have specific terms for relations by marriage. For example, a "sister-in-law" can be a "snaha/snaja" (brother's wife, though also family-member's wife in general), "zaova" (husband's sister), "svastika" (wife's sister) or "jetrva" (husband's brother's wife). A "brother-in-law" can be a "zet" (sister's husband, or family-member's husband in general), "djever/dever" (husband's brother), "šurak/šurjak" (wife's brother) or "badžanak/pašenog" (wife's sister's husband). Likewise, the term "prijatelj" (same as "makhatunim" in Yiddish, which also translates as "friend") is also used. Bengali has a number of in-law words. For example, Boudi (elder brother's wife), Shaali (wife's sister), Shaala (wife's younger brother), Sambandhi (wife's elder brother/Shaali's husband), Bhaasur (husband's elder brother), Deor (husband's younger brother) Nanad (husband's sister), Jaa (husband's brother's wife), etc. This is also true for Latin, with words such as (husband's brother), (husband's sister), (husband's brother's wife), yet none for the wife's part of the family tree. In Russian, fifteen different words cover relations by marriage, enough to confuse many native speakers . There are for example, as in Yiddish, words like "" and "" for "co-in-laws". To further complicate the translator's job, Russian in-laws may choose to address each other familiarly by these titles. In contrast to all of the above fine distinctions, in American English the term "my brother-in-law" covers "my spouse's brother", "my sibling's husband", and "my spouse's sibling's husband". In British English, the last of these is not considered strictly correct. Work and school relations Japanese has a concept, amae, about the closeness of parent-child relationship, that is supposedly unique to that language and culture as