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In pretty much any language which has a gettext implementation, "_" is the name used for the function/method/whatever which marks a string for translation. This is just as true in JavaScript (at least two JS gettext implementations that I know of use "_"). It's one of the few truly cross-language naming conventions I know of.

But libraries which expect to be able to use "_" for something other than gettext break this convention, and not only run the risk of screwing interoperability but also cause confusion for the (large number of) developers who are accustomed to "_" having a particular meaning.




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