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fix(eid-wallet): show the identity verification screens in the app's language - #1154
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…language Didit renders its own UI, so the translations added in #1145 never reached the verification screens: a Russian user saw English from the moment verification started. Didit takes a `language` on session creation and supports both ru and uk under the same ISO 639-1 codes the app already uses. Without it Didit falls back to detecting the browser language, which does not work inside the Tauri webview. The locale has to travel from the wallet through the provisioner, so this touches both sides. The wallet sends its active locale on the four calls that open a session — ePassport, onboarding, the KYC upgrade overlay and account recovery — and evault-core forwards it to Didit. Anything that is not a plausible ISO 639-1 code falls back to `en` rather than being handed to Didit as-is. Recovery is the one that mattered most: someone recovering an account is already in trouble, and that was the worst place to drop them into English. Closes #1153
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📝 WalkthroughWalkthroughWallet verification and recovery requests now include the current locale. evault-core validates the language value, passes it to Didit when creating sessions, and uses it in fallback verification URLs. ChangesVerification locale propagation
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: 🟡 Moderate · up to Verification or recovery requests using an unsupported locale may fail to start. Restrict the accepted codes to Didit’s supported languages before merging. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change appears limited to verification-screen language. Existing session identity and access controls remain in place, but the provider behavior and fallback URL have not been tested in a live session. Retained concerns Security review detailsSecurity Blast Radius
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Verified against Didit's API: the locale is carried by the URL path, not by the session. Creating a session with language ru returns verify.didit.me/ru/session/<token>, and the page renders in Russian; en and uk follow the same shape. Both controllers fell back to a hardcoded verify.didit.me/session/<token> when Didit's response carries neither verification_url nor url. That fallback would have produced an English page from a session created in Russian, which is the one thing this change exists to prevent. It now carries the same language sent to Didit.
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Inline comments:
In `@infrastructure/evault-core/src/utils/verificationLanguage.ts`:
- Line 14: Update the language validation in the function containing the
ISO_639_1 check to use Didit’s supported language-code set, falling back to "en"
for unsupported values even when they match the current pattern. Add a test
confirming a valid-shaped unsupported code falls back to "en".
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infrastructure/eid-wallet/src/routes/(app)/ePassport/+page.svelteinfrastructure/eid-wallet/src/routes/(app)/main/legacy/KycUpgradeOverlay.svelteinfrastructure/eid-wallet/src/routes/(auth)/onboarding/+page.svelteinfrastructure/eid-wallet/src/routes/(public)/recover/+page.svelteinfrastructure/evault-core/src/controllers/RecoveryController.tsinfrastructure/evault-core/src/controllers/VerificationController.tsinfrastructure/evault-core/src/utils/verificationLanguage.spec.tsinfrastructure/evault-core/src/utils/verificationLanguage.ts
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…own list Checking only the shape of the code accepted values like es-MX and zz, which Didit does not offer. Forwarding one risks a rejected session, and a rejected session means verification or recovery never starts — the opposite of failing safe. An unlisted code now falls back to en. The list will drift as Didit adds languages, but drift costs an English screen where a translated one existed, whereas the permissive version cost the whole flow. Nothing the wallet sends is affected: paraglide only ever yields en, ru or uk. Reported by CodeRabbit on #1154.
Sahil2004
approved these changes
Sep 25, 2026
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Description of change
The identity verification screens come from Didit's hosted UI, so the translations in #1145 never reached them: a Russian or Ukrainian user saw English from the moment verification started.
Didit takes a
languageon session creation and supportsruandukunder the same ISO 639-1 codes the app already uses. We were omitting it, and Didit's fallback — detecting the browser language — does not work inside the Tauri webview.The locale has to travel from the wallet through the provisioner, so this touches both sides. The wallet sends its active locale on the four calls that open a session;
evault-coreforwards it to Didit.Issue Number
Closes #1153
Type of change
Fix (a change which fixes an issue)
How the change has been tested
pnpm checkineid-wallet(0 errors, 5 pre-existing warnings) andtscinevault-coreboth pass. The five specs covering verification and recovery pass — 25 tests, including 12 new ones on the code validation.The full
evault-coresuite only runs where Postgres and Neo4j are up, so locally it was the targeted specs; CI runs the rest and is green.Verified against Didit's live API with a sandbox workflow. A session created with
language: "ru"returnsverify.didit.me/ru/session/<token>and the page renders in Russian; omitting the field returns the unprefixed URL and English.enandukreturn the same shape, so the locale travels in the URL path rather than on the session.Change checklist
Notes
/recovery/start-sessionrather than/verification/v2, so it needed handling separately.verify.didit.me/session/<token>when Didit returns neitherverification_urlnorurl. Since the locale lives in the path, that fallback would have served an English page from a Russian session, so it now carries the language too.eninstead of being handed to Didit as-is. Format is checked rather than matched against a fixed list, so adding a wallet locale needs no change here.Docs: https://docs.didit.me/sessions-api/create-session
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