What Does "Language Needs Improvement" Actually Mean?
It is one of the most common — and most deflating — phrases in academic peer review: "The language needs improvement before this manuscript can be considered for publication." Reviewers rarely elaborate, leaving authors to wonder: Is it my grammar? My vocabulary? My sentence structure? All of the above?
The short answer is that this comment is almost always an umbrella term. It typically covers a cluster of interconnected issues rather than a single error. Understanding which specific problems reviewers are flagging is the first step to fixing them efficiently before resubmission.
The Most Common Issues Hidden Behind This Comment
1. Grammar and Syntax Errors
Grammatical mistakes are the most obvious trigger for language feedback. These include incorrect verb tense usage, subject–verb disagreement, misplaced modifiers, and faulty parallel structure. In academic writing, tense consistency is particularly important — for example, the past tense is standard when describing your methodology, while the present tense is used for established facts. Reviewers notice inconsistencies immediately, even if they cannot always name the rule being broken. If you find grammar a recurring challenge, our post on 15 most common grammar mistakes in academic writing is a useful starting point.
2. Unclear or Convoluted Sentences
Academic writing often suffers from sentences that are technically grammatical but practically impenetrable. Overlong sentences packed with multiple clauses, excessive use of passive voice, and unnecessary nominalisations (turning verbs into nouns, e.g. "make an assumption" instead of "assume") all contribute to a heavy, unclear style. Reviewers equate clarity with rigour — if they struggle to follow your argument, they question the quality of your thinking, not just your writing.
3. Inconsistent Academic Register
Academic writing requires a consistently formal register. Slipping into informal phrasing ("a lot of", "basically", "things"), using contractions, or alternating between technical and non-technical language disrupts the professional tone journals expect. This is especially common in papers written by non-native English speakers, though native speakers are not immune. Our post on common ESL academic writing mistakes addresses many of these register issues in detail.
4. Imprecise Word Choice
Choosing words that are close in meaning but not quite right is a subtle problem that reviewers in specialised fields notice quickly. Terms like "significant", "important", "prove", and "show" have precise meanings in academic discourse and are frequently misused. Imprecision can also make claims seem weaker or stronger than your data supports — a serious issue in research writing.
5. Spelling and Punctuation Inconsistencies
Mixing British and American English spellings ("colour" vs. "color"), inconsistent hyphenation, and comma splices are small errors that accumulate into a broader impression of carelessness. Journals typically require adherence to one spelling standard, and deviating from it signals a lack of attention to detail.
How to Fix Language Issues Before Resubmission
Step 1: Read the Reviewer Comments Carefully
Even when language feedback is brief, look for clues. Did the reviewer cite a specific section or sentence? Did they mention clarity, flow, or terminology? Use any specifics to anchor your revision. If the reviewer provided no examples, treat the entire manuscript as requiring a thorough language audit.
Step 2: Print and Read Aloud
Reading your manuscript aloud — or using a text-to-speech tool — forces you to process every word rather than skimming over familiar text. Your ear will catch awkward phrasing, run-on sentences, and rhythm problems that your eye has learned to ignore.
Step 3: Work Section by Section
Revise your manuscript in structured passes rather than trying to fix everything at once. Focus on one section per sitting, starting with the abstract and introduction — the sections reviewers and editors read most carefully. For abstract-specific guidance, see our post on what editors look for in a well-written abstract.
Step 4: Check Style Guide Compliance
Confirm that your manuscript follows the target journal's required style guide throughout — including in-text citations, reference formatting, heading levels, and spelling conventions. Many language-related rejections are partly style-compliance failures in disguise.
Step 5: Get a Professional Language Review
Self-editing has real limits. After several drafts, authors become blind to their own errors and writing habits. A professional academic editing service provides an independent, expert eye — correcting grammar, improving sentence clarity, standardising register, and ensuring your manuscript meets the language standards journals expect. If your resubmission deadline is tight, rush delivery options are available to get your manuscript back quickly without compromising quality.
Writing Your Response to Reviewers
When you resubmit, your response letter needs to address the language comment directly and professionally. Do not simply write "language has been improved". Instead, briefly describe the steps you took: a thorough self-revision, correction of grammar and consistency issues, and professional editing. This signals to editors that you have treated the feedback seriously and that the revised manuscript merits a fresh read.
Prevention: Build Language Quality Into Your Writing Process
The most effective strategy is to avoid language issues reaching peer review in the first place. Build a proofreading stage into every manuscript workflow — before submission, not after rejection. Use a proofreading checklist to systematically review grammar, style, consistency, and formatting before you hit submit. The time invested is far less than the delay caused by a revise-and-resubmit cycle.
Receiving language feedback from a reviewer is not the end of the road — it is a clear, fixable problem with a clear solution. By understanding what reviewers mean, targeting the right issues, and seeking professional support where needed, you can return a stronger manuscript and significantly improve your chances of acceptance.
