If you can sponsor your child abroad for a bachelor's degree as a Nigerian parent, I recommend that you send them to study in Taiwan especially if their course of interest is in this list of English-taught programs.
It is very cost-effective as opposed to sending them to study in the USA and UK. Also, applicants to these schools and programs can apply for the Taiwan Scholarship Programs available.

Here are the universities and the various bachelor's degree programs offered purely in English:

1. National Chung Hsing University
a. International Bachelor Program of Agribusiness

2. National Taipei University of Technology (Taipei Tech)
a. International Program for Interaction Design and Innovation
b. Department of English programs

3. National Pingtung University of Science and Technology
a. International Bachelor's Degree Program in Finance
b. Department of Tropical Agriculture and International Cooperation Programs

4. Feng Chia University
a. Bachelor of International Business Administration program - taught fully in English

5. Southern Taiwan University of Science and Technology
a. Department of International Business / International Business

6. National Dong Hwa University
a. Department of Computer Science and Information Engineering
b. Bachelor of Management Science and Finance program
c. Department of Finance

7. Ming Chuan University
a. International Business and Trade Program (B.S.)
b. Journalism & Mass Communication Program (B.A.)
c. Fashion and Innovation Management Program (B.S.)
d. Information Technology Management Program (B.S.)
e. Travel & Tourism Program (B.S.)
f. International Affairs and Diplomacy bachelor's degree program (B.A.)
g. Department of Applied English (B.A.)

8. Kun Shan University
a. International Program in Mechanical Engineering

9. Tamkang University
a. Department of Computer Science and Information Engineering Program (English taught)
b. Department of Global Politics and Economics (English-taught)
c. Department of English (English-taught)
d. Department of International Tourism Management (English-taught)
e. Division of Global Financial Management, Department of Banking and Finance (English taught)
f. Division of Global Commerce, Department of International Business (English-taught Program)
g. Department of Diplomacy and International Relations (English-taught)

10. Shih Chien University
a. English-Taught Programs in International Business
b. English-Taught Smart Service Management Program

11. I-SHOU University
a. International Business Administration
b. International Finance
c. International Tourism & Hospitality
d. Department of International Media and Entertainment Management
e. International Artificial Intelligence Technology Program

12. National Sun Yat-sen University
a. International Business Bachelor program

13. Tunghai University
a. International Business Administration Program
b. Sustainability Science and Management Program
c. International College Interdisciplinary Degree Program

14. National Chengchi University
a. International College of Innovation (ICI) bachelor's degree program

15. National Yang Ming Chiao Tung University
a. Department of Civil Engineering - Fully English taught Undergraduate Program

16. National Kaohsiung University of Hospitality and Tourism
a. International Bachelor of Tourism Management Program
b. International Bachelor of Culinary Arts Program

17. Da-Yeh University
a. Department of English

18. National Tsing Hua University
a. Tsing Hua College Group International Bachelor Degree Program

19. CTBC Business School
a. Bachelor of Business Administration - Financial Management Program

20. Yuan Ze University
a. English Bachelor of Business Administration
b. International Bachelor of Electrical and Communication Engineering Program (English-taught)

21. National Yunlin University of Science and Technology
a. Bachelor of International Management Program
b. Department of English

22. National Cheng Kung University
a. International Bachelor of Energy Engineering Degree Program

23. Tzu Chi University
a. Bachelor of International Service Industry Management Program
b. Bachelor of Digital Media and Technology Program

24. Fu Jen Catholic University
a. Interdisciplinary Studies - Bachelor's Degree Program

25. Chinese Culture University
a. Department of Global Business

26. National Taiwan University
a. Department of Economics
b. Department of Civil Engineering

27. Providence University
a. International Business Administration Program
b. International Program in Computer Science

28. Kainan University
a. International Honors Program

29. National Taiwan University of Science and Technology
a. International Advanced Technology Program

Good luck.

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