Here are a few description options for the WordPress post_tag “哪種語言” (Which Language?) in Traditional Chinese, ranging in length and tone:

**Option 1 (Short & Sweet):**

> 說明文章所使用的語言。 (Describes the language used in the article.)

**Option 2 (Slightly More Descriptive):**

> 標示本文章所使用的語言，方便讀者快速了解內容。 (Marks the language used in this article, making it easier for readers to grasp the content quickly.)

**Option 3 (Informative & Keyword-focused):**

> 標籤用來分類文章使用的語言，包含中文、英文、日文等，方便讀者過濾感興趣的語言內容。 (A tag used to categorize the language used in the article, including Chinese, English, Japanese, etc., making it easier for readers to filter content in the languages they’re interested in.)

**Option 4 (Focus on Readers):**

> 您想知道這篇文章是用什麼語言寫的嗎？ 點擊這個標籤就能找到！ (Do you want to know what language this article is written in? Click this tag to find out!)

**Option 5 (Concise and SEO-Friendly):**

> 語言分類: 辨識文章使用的語言，包括中文、英文等。 (Language Category: Identifies the languages used in this article, including Chinese, English, etc.)

**Choosing the best option depends on your needs:**

* **Simplicity:** Option 1 is the quickest and easiest.
* **Clarity:** Option 2 and 4 provide good explanations.
* **SEO & Keywords:** Option 3 and 5 are useful if you want to emphasize language categorization.

Remember to choose the description that best suits your overall website branding and content strategy. Good luck!