in packages/babel-plugin-fbt/src/translate/IntlVariations.js [84:92]
function isValidValue(value: string | number): boolean {
const num = Number(value);
/*eslint no-bitwise: 0*/
return (
SPECIALS[value] ||
(num & IntlVariationMask.NUMBER && !(num & ~IntlVariationMask.NUMBER)) ||
(num & IntlVariationMask.GENDER && !(num & ~IntlVariationMask.GENDER))
);
}