* Resolves the {{languageInstruction}} placeholder in a prompt.
     *
     * @param prompt the prompt template
     * @return the prompt with language instruction resolved
     */
    protected String resolveLanguageInstruction(final String prompt) {
        if (prompt == null) {
            return null;
        }
        final String languageInstruction = getLanguageInstruction();
        if (logger.isDebugEnabled()) {