If you're interviewing in your second language, the most effective strategy is to rely on structure, signposting and short sentences, which reduces the language load and makes your thinking easier to follow. Interviewers assess clarity and logic, not native-speaker fluency, and many consulting firms recruit internationally in English.
Do firms penalise non-native English?
Firms evaluate whether you can communicate clearly with clients and colleagues. A noticeable accent or occasional grammatical slip is normal in international offices. What hurts candidates is lack of clarity: rambling, losing the thread or misunderstanding the question. BCG's Middle East page notes that only English is required, and many European offices interview in English. Check whether your target office interviews in English, the local language or both. Some offices may test local-language ability separately.
How does structure help in a second language?
Signpost everything
Phrases like "There are three areas I'd like to explore...", "First...", "Second..." and "To summarise..." act as scaffolding. The interviewer always knows where you are, even if a sentence isn't perfect.
Use short sentences
Long sentences with clauses are where grammar breaks down. "Revenue fell 10%. Volume was stable. So the decline is price-driven." is clearer than one long sentence.
Build a phrase bank
Memorise a small set of high-utility phrases:
- "Just to confirm my understanding..."
- "Could I take a minute to structure my thoughts?"
- "My initial hypothesis is..."
- "Let me sense-check that number..."
- "The key implication for the client is..."
- "Overall, I'd recommend... for three reasons..."
How do you handle maths in a second language?
Many people do arithmetic in their first language internally. That's fine, but practise saying numbers aloud in English, especially large ones (millions and billions), decimals and percentages. Common pitfalls:
- Billion conventions: in modern English usage, a billion is 1,000,000,000. Some languages use different words for this scale, so double-check.
- Decimal separators: say "point" (3.5), not "comma".
- Percentages vs percentage points (see how to read case interview charts and exhibits).
What if you don't understand the question?
Ask. It's completely acceptable, and better than answering the wrong question. Useful phrases:
- "Could you repeat the last part, please?"
- "When you say 'throughput', do you mean units per hour?"
- "Let me paraphrase to make sure I've understood..."
McKinsey's virtual interview guidance explicitly encourages candidates to ask interviewers to repeat questions if they're unclear.
How do you handle behavioural interviews?
Behavioural interviews demand more natural language than cases, because you're telling stories. Tips:
- Prepare stories in bullet points in English, not as translated scripts.
- Practise telling each story several times so key vocabulary becomes automatic.
- Use concrete actions and numbers, which carry meaning regardless of fluency.
- Don't over-memorise. Under follow-up pressure, scripts break down more easily than understood stories.
How do you prepare the language specifically?
- Learn business vocabulary: see our consulting and PE interview glossary.
- Read business news in English daily for idiomatic phrasing.
- Record yourself doing cases and listen for filler words and unclear phrases.
- Practise with native and non-native speakers to get used to different accents.
- Do volume: fluency in case language comes from repetition.
AI interview practice is especially valuable for non-native speakers because you can practise as many times as you need without worrying about taking up a partner's time. An AI interviewer such as caize.ai lets you rehearse case language, signposting and numbers out loud at your own pace. Also check how well any tool handles your accent before relying on its feedback about clarity.
What about online assessments and video interviews?
Online cases (like BCG's chatbot-based assessment) are text-based, so reading speed matters. Practise reading business texts quickly in English. Recorded video interviews give you short preparation time, so a phrase bank and clear structure help even more (see our video interview tips).
FAQ
Should I mention that English is my second language?
Usually there's no need. If relevant, a brief mention is fine, but focus on demonstrating clarity.
Can I ask to interview in my native language?
Some offices interview in local languages. Ask your recruiter what's possible.
Will my accent affect my score?
Interviewers generally assess clarity of communication, not accent.
Is it OK to pause to find a word?
Yes. A short pause is fine, and a simpler word works just as well.
