Here are a few descriptions for the WordPress post tag “雙重國籍” (Shuāngchóng Guójí – Dual Nationality) in Traditional Chinese, varying in tone and focus:

**Option 1 (Concise & Informative):**

> 標籤：雙重國籍。 涵蓋有關雙重國籍的所有文章，包括申請流程、權利義務、法律規定、以及不同國家之間的相關協議。

> *Translation:* Tag: Dual Nationality. Covers all articles related to dual nationality, including application procedures, rights and obligations, legal regulations, and related agreements between different countries.

* **Focus:** Practical and informative. Good for a general audience looking for information.

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

> 探索雙重國籍的世界。 本標籤整理了關於擁有雙重國籍的各種面向，例如：獲得、放棄、以及在不同國家生活的影響。

> *Translation:* Explore the world of dual nationality. This tag compiles various aspects of holding dual nationality, such as acquisition, renunciation, and the impact of living in different countries.

* **Focus:** Broader scope, highlighting the different facets of dual nationality.

**Option 3 (More Legal/Formal):**

> 處理雙重國籍議題的專業指南。 本標籤收錄相關文章，涵蓋雙重國籍的法律定義、各國相關法規，以及可能產生的法律後果。

> *Translation:* A professional guide to handling the issues of dual nationality. This tag includes relevant articles covering the legal definitions of dual nationality, the relevant regulations of different countries, and the potential legal consequences.

* **Focus:** Emphasizes legal and regulatory aspects, suitable for users looking for in-depth legal information.

**Option 4 (Focus on Implications and Benefits):**

> 深入了解雙重國籍帶來的機會。 本標籤探討了雙重國籍的優缺點，包括旅行便利、經濟機會、以及如何在不同文化之間取得平衡。

> *Translation:* Gain an in-depth understanding of the opportunities brought about by dual nationality. This tag explores the advantages and disadvantages of dual nationality, including travel convenience, economic opportunities, and how to strike a balance between different cultures.

* **Focus:** Focuses on the positive and practical implications, like travel, career, and cultural experiences.

**How to choose the best option:**

* **Consider your overall blog theme:** Is your blog legal-focused? Choose Option 3. Is it focused on personal experiences and lifestyle? Option 4 might be better. A general-purpose blog would probably work best with Option 1 or 2.
* **Target audience:** Who are you writing for? New immigrants? Legal professionals? Tourists?
* **Keywords:** Remember to incorporate relevant keywords that people might use when searching for information (e.g., “申請”, “放棄”, “權利”, “義務”, “法律”, “規定”).

I recommend using Option 1 or 2 as a good starting point, and then adjusting it based on the specifics of your WordPress blog. Remember to adjust the description based on the topics and content of the articles in this tag!