how to pass a typecript variable to aria-label ?

follow code:

//function that returns the user's browser language.

private setLiterals(): void {
    const lang = this.languageService.getShortLanguage();

    if (lang in poRichTextLiteralsDefault) {
      this.ariaLabel = poRichTextLiteralsDefault[lang].textColor;
    }
  }

<input
          aria-label="????"
/>