getCurrentLanguage() {
			const sLanguage = Localization.getLanguage();
			if (typeof sLanguage !== "string") {
				return "";
			}

			const nIndex = sLanguage.indexOf("-");
			if ((nIndex < 0) && (sLanguage.length <= 2)) {
				return sLanguage.toUpperCase();
			}
			if (nIndex > 0 && nIndex <= 2) {
				return sLanguage.substring(0, nIndex).toUpperCase();
			}

			return "";
		}
Returns the current language in ISO 639-1 format.

@returns {string} Language in ISO 639-1. Empty string if language cannot be determined

@private
@ui5-restricted sap.ui.fl