I should think that there is no common word for anything in any language. The word for or cognates of philosophy appeared  in different languages at different historical moments in different contexts, and have had  different meanings and connotations. It would be useful to see the different values of different related terms that suggest the meaning of the word, philosophy, without it being exactly the same thing.Isn't there a word like 'falsafia' in Persian-Urdu? How do the terms of pensée, philosophie and théorie differ in French, for example? In Malayalam, there are words like tattwachinta, chinta (pensée), darhanam (vision; a rather recent introduction). In Hindi, one even uses the term, darshanshastra (literally, 'vision science')? Strange are the ways of language, isn't it? Doesn't that make the task of philosophy even more difficult, irrespective of the word that one may use to refer to it?