Native Language & Correction Language

What Is Native Language?

Your Native Language is the first language you grew up speaking — not the language you are practising.

The AI tutor uses this in two ways:

1.L1 interference awareness — it anticipates the grammar and vocabulary mistakes that are common for speakers of your language (e.g. article omission for Japanese and Korean speakers, false cognates for Spanish speakers, tonal confusion for Mandarin speakers).

2.Native-language explanations — when your Correction Language is set to "My native language" or "Bilingual", the AI delivers brief corrections and grammar notes in your chosen language.

What Is Correction Language?

Correction Language controls the language the AI uses when explaining errors during a session. There are three options:

•English Only — all feedback and corrections are given in English. Best if you want full immersion.

•In My Language — corrections and grammar notes are given in your native language. Useful when you need to fully understand an explanation without the extra cognitive load of processing it in English.

•Bilingual — the AI gives the correction in English first, then adds a short clarification in your native language (one sentence). A good middle ground for most learners.

Note: Correction Language has no effect during assessments — assessors give all feedback in English regardless of this setting.

Supported Languages (GA)

The following 23 languages are fully supported at General Availability (GA) tier on OpenAI's realtime voice model:

Arabic · Bengali · Chinese (Cantonese) · Chinese (Mandarin) · English · French · German · Hindi · Indonesian · Italian · Japanese · Korean · Malay · Persian (Farsi) · Polish · Portuguese · Russian · Spanish · Tamil · Thai · Turkish · Urdu · Vietnamese

These languages are chosen because they have confirmed GA-tier performance across both spoken transcription (Whisper-based) and written text generation (GPT-5). If your language is not listed, select the closest language or choose "English Only" for Correction Language.

Where Can You Change These Settings?

There are two places to update Native Language and Correction Language:

1.Change Settings panel (before a session) — tap Change Settings on any practice or lesson page before you start. The selections apply to the upcoming session.

2.In-session Settings panel — tap the Settings icon while in a lesson or free-practice session. The session reconnects immediately with the new settings, so the AI adopts them straight away. Note: this ends and restarts your current conversation.

Can I Change These Mid-Session?

Yes — via the in-session Settings panel (Settings icon in the session toolbar). When you save changes there, the session disconnects and immediately reconnects with the updated settings. Your conversation transcript is cleared, and the AI starts fresh with the new language configuration.

If you only want to change settings for your next session without interrupting the current conversation, close the session first and then adjust them in the Change Settings panel before starting a new one.