Do you understand the research in your field perfectly, yet lose a whole afternoon over one paragraph in English? That gap between thinking and writing is normal for international students, and it is not a sign of weak research. A second-language thesis asks you to master two things at once: the conventions of academic English and the specific way your discipline argues. This guide offers eight strategies that reduce the extra effort, explains what help universities allow, and suggests a realistic timeline. Spelling follows British conventions.
This article is part of our guide How to Write a Master’s Thesis by the Mastermind PhD team and relates to our Academic Proofreading & Review service. Sources last checked: November 2026.
What is a second-language thesis? It is a master’s or doctoral thesis written in a language that is not the author’s first language, most often English at universities in the UK, Europe and elsewhere. The academic requirements are the same as for any thesis; the difference lies in the writing process, which usually needs more reading, more drafting time and more targeted feedback on language.
Why does a second-language thesis take longer to write?
Three separate loads compete for your attention while you write: the content (what you want to argue), the genre (how a literature review or a discussion is organised in your field) and the language itself (grammar, vocabulary, collocations). First-language writers handle the language load almost automatically. Handbooks on the subject, such as Paltridge and Starfield (2020), give as much attention to the structure of each thesis part as to grammar, which is good news: genre can be learned quickly by studying examples.
Strategy 1: Read like a writer
Choose three to five recent theses or articles from your department that your supervisor considers well written. Read them twice: once for content and once for language. On the second reading, note how authors open a chapter, introduce a source, report a result and admit a limitation. This turns your reading list into a model of the second-language thesis you are aiming to write.
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Strategy 2: Build a personal phrase bank
Copy useful phrases (not content) into a document organised by function:
| Function | Example phrases |
|---|---|
| Introducing a gap | Little attention has been paid to… / Few studies have examined… |
| Reporting a source | Lee (2019) argues that… / According to Lee (2019),… |
| Describing method | Data were collected through… / Participants were recruited from… |
| Reporting results | Scores were significantly higher in… / No significant difference was found… |
| Hedging | These findings suggest… / One possible explanation is… |
| Stating limitations | The findings should be interpreted with caution because… |
The University of Manchester’s Academic Phrasebank is organised in exactly this way and is free to use. Reusing generic phrases is normal academic practice; copying a source’s specific sentences is not.
Strategy 3: Separate thinking from polishing
Do not try to write perfect English in the first draft. Write the argument quickly, even with gaps or a few words in your first language in brackets, then revise for structure, and only at the end edit sentences. Many writers of a second-language thesis lose hours polishing paragraphs that are later deleted. Outlining each section in bullet points first also reduces the language load, because you only need to turn points into sentences.
Strategy 4: Write short, clear sentences
In a second-language thesis, long sentences multiply grammar errors. Aim for one main idea per sentence and about 15 to 25 words. Put the subject and verb early, avoid stacking clauses, and use connectors (however, therefore, in contrast) to show relationships instead of building them into one long sentence. Clear, plain sentences are valued in academic English; complexity of ideas does not require complexity of grammar.
Strategy 5: Learn your personal error patterns
Most international students repeat a small number of errors: articles, uncountable nouns, tense choice, prepositions or comma splices. Keep a log of every correction your supervisor or a proofreader makes, group them, and check your next chapter for those patterns only. Our list of 25 common grammar errors in academic English is a good starting checklist for a second-language thesis.
Strategy 6: Use feedback strategically
Supervisors have limited time for language. Make their feedback count:
- Send a short section early rather than a full chapter late, and ask whether the style is appropriate for the field.
- Ask specific questions: “Is my use of tense in the results correct?” works better than “Is my English OK?”.
- Join writing groups, retreats or the academic writing courses that many universities offer to international students.
- Exchange chapters with a peer, ideally one whose first language is English and who is also writing.
Strategy 7: Use tools within the rules
Tools can help, but universities draw clear lines. At the University of Leeds, for example, the postgraduate research proofreading policy allows a third-party proofreader to correct spelling, punctuation, grammar and word usage, but not to rewrite sentences, change arguments or translate work into English, and the thesis must acknowledge the proofreader. The University of Birmingham’s guidance on Grammarly treats basic spelling, punctuation and grammar corrections as acceptable but rules out translation and generative AI features that rewrite text for assessed work.
| Tool or help | Usually acceptable | Usually not acceptable |
|---|---|---|
| Spell and grammar checkers | Correcting spelling and basic grammar | Accepting automatic rewrites of whole sentences |
| Dictionaries and corpora | Checking word meaning and collocations | Not applicable |
| Machine translation | Understanding a source in another language | Translating your own drafts into English for submission, where rules forbid it |
| Generative AI | Only where your university explicitly allows it, and declared | Generating or rewriting thesis text |
| Proofreader | Surface corrections within policy, acknowledged | Rewriting content or argument |
Rules differ between universities and change often, so read your own institution’s policy and ask your supervisor before using any tool on a second-language thesis.
Strategy 8: Plan extra time
Build the language work of a second-language thesis into your timeline instead of hoping it will fit at the end. A realistic plan adds time at each stage:
| Stage | Suggested extra time |
|---|---|
| Each chapter draft | One extra week for revision of structure and language |
| Supervisor feedback cycles | One additional cycle per chapter |
| Final proofreading | Two to three weeks before submission, including time to check every change |
| Abstract and introduction | Extra revision rounds, because examiners read these first |
These figures are planning suggestions, not university rules; adjust them to your program length.
What should you remember about examiners?
Examiners assess the research, the argument and its presentation. In most programs they do not expect a second-language thesis to read like a novel by a native writer, but they do expect clarity: every claim understandable, terms used consistently, and no errors that change meaning. If language problems obscure your argument, the result may be required corrections; if the language is clear and correct, your accent on the page will not count against you.
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Frequently asked questions
Will examiners penalise me for not being a native speaker?
Examiners assess clarity and accuracy, not whether you sound native. Clear writing with occasional minor errors is generally acceptable; errors that obscure meaning are not.
Can I write in my first language and translate the thesis?
Check your rules. Some universities forbid translating your own work into English with a third party or a tool for assessed work. Writing directly in English, even slowly, is usually the safer path.
Can I use a proofreader for my thesis?
Many universities allow it within limits: corrections to spelling, grammar and punctuation, but not rewriting or new content. Some require you to acknowledge the proofreader in the thesis.
How can I improve my academic vocabulary quickly?
Read model texts in your field, record collocations in a phrase bank and use a learner’s dictionary or the Academic Phrasebank. Learning phrases by function is faster than learning single words.
Is it acceptable to use AI to improve my English?
Only if your university and supervisor explicitly allow it, and usually with a declaration. Many policies forbid tools that rewrite or generate text for assessed work.
Sources
- Paltridge, B., & Starfield, S. (2020). Thesis and Dissertation Writing in a Second Language: A Handbook for Students and Their Supervisors (2nd ed.). Routledge.
- Swales, J. M., & Feak, C. B. (2012). Academic Writing for Graduate Students: Essential Tasks and Skills (3rd ed.). University of Michigan Press.
- Morley, J. Academic Phrasebank. The University of Manchester. https://www.phrasebank.manchester.ac.uk/ (accessed November 2026)
- University of Leeds. Postgraduate research proof-reading policy and guidance. https://students.leeds.ac.uk/postgraduate-research-during-research/doc/postgraduate-research-proof-reading-policy-guidance (accessed November 2026)
- University of Birmingham, Library Services. Using Grammarly responsibly within your academic work. https://intranet.birmingham.ac.uk/student/libraries/asc/grammarly.aspx (accessed November 2026)
Sources last checked: November 2026. This article is general educational guidance and does not replace your university regulations or your supervisor’s instructions. How we prepare our content.