Translate Your Entire App in Seconds with AI

Manual translation is slow. Hiring translators is expensive. Copy-pasting into Google Translate loses your variables, and by the time you've pasted string number forty back into lang/es/messages.php, you've stopped checking whether {count} survived the round trip. LangSyncer's AI translation fixes this: one click translates a key into every language in your project, placeholders intact, results saved as drafts you review before publishing. Here's what that looks like in a real Laravel project, including the quota math so you know exactly what it costs.

The Problem in a Real Laravel App

Say you've just built an orders feature. Your English lang file is done:

<?php

// lang/en/messages.php

return [
    'welcome' => 'Welcome back, {name}! You have {count} new messages.',
    'orders_empty' => 'You have no orders yet.',
    'orders_shipped' => 'Your order shipped on {date}.',
    'orders_cancelled' => 'This order was cancelled.',
];

But your app ships in Spanish, French, German, Portuguese, and Italian, and right now those files are behind:

<?php

// lang/es/messages.php

return [
    'welcome' => '¡Bienvenido de nuevo, {name}! Tienes {count} mensajes nuevos.',
    // orders_empty: missing
    // orders_shipped: missing
    // orders_cancelled: missing
];

Multiply three missing keys by five languages and you've got fifteen strings to source, paste, verify, and format. For a real feature with forty new keys, that's two hundred strings. Nobody does that carefully by hand at 6pm on release day, which is how apps end up showing English fallbacks in their French UI.

The Walkthrough: Translate Missing in Bulk

Here's the LangSyncer workflow from empty language files to published translations.

Add your keys with source text. Create the new keys in the dashboard and fill in the English values. Creating keys never consumes quota, so add everything up front. Batching matters: adding all keys first and translating once is cheaper to review and triggers fewer CDN regenerations than translating key by key.
Click Translate Missing. Available from the Translations page or the project's actions modal. Before anything runs, you get a summary: total translations to process, how many are missing, and the estimated quota consumption. Nothing is charged until you confirm.
Start the translation. The job scans your project for translations with missing language values, uses the first available language as source, and fills in the rest. It runs synchronously with a progress indicator; a typical 500-key project finishes in under 5 minutes.
Review the drafts. AI output is saved as drafts, not published directly. Spot-check placeholders and terminology (more on both below), then publish. Your Laravel app picks the changes up instantly in live mode, or on the next translator:sync in static mode.

After publishing, the missing Spanish file from above is complete:

<?php

// lang/es/messages.php — after Translate Missing + publish

return [
    'welcome' => '¡Bienvenido de nuevo, {name}! Tienes {count} mensajes nuevos.',
    'orders_empty' => 'Todavía no tienes pedidos.',
    'orders_shipped' => 'Tu pedido se envió el {date}.',
    'orders_cancelled' => 'Este pedido fue cancelado.',
];

Note that {name}, {count}, and {date} came through untouched. The AI recognizes Laravel-style placeholders, both {name} and :name variants, and preserves them along with line breaks and punctuation. If you want the single-key version of this flow instead, AI Autofill on the translation form translates one key into all empty language fields at once, and lets you pick a different source language from the dropdown if English isn't your base.

The Quota Math

Quota is the honest cost of all this, and the formula is simple: 1 unit per target language. Translating one key into 5 languages costs 5 units. So for our orders feature:

3 missing keys × 5 target languages = 15 units
A full 40-key feature × 5 languages = 200 units

Two things follow from that math. First, the Free tier's 100 units per month covers small features and side projects, but a 40-key feature into 5 languages won't fit in one month. The Icebreaker tier includes 3,000 units per month, enough for roughly fifteen features that size. Second, re-translating the same text costs again, so review the draft before you hit translate a second time out of habit.

Monthly quota resets each billing cycle and doesn't roll over. Quota packs, on the other hand, never expire, which makes them the right tool for one-off bulk jobs like translating your app into a new language. You can also set per-project caps so a side project can't drain the account. The full breakdown is in the quota management docs.

Where AI Translation Falls Short

Quality varies by language pair, and it's worth being honest about it. English to Spanish, French, German, Portuguese, and Italian is excellent, near-native for UI strings. Dutch, Polish, Swedish, and Danish are very good. Japanese, Chinese, Korean, and Arabic are good but benefit from a review pass.

And some content shouldn't ship on AI output alone regardless of language pair: legal text, marketing copy where brand voice matters, and safety instructions all need a human review. The AI can also drift on terminology across a large project ("Dashboard" might become "Panel" in one key and "Tablero" in another), so scan for consistency. For UI strings like "Save" and "Cancel"? Ship it.

If you're weighing this against a traditional TMS with human translation workflows built in, see how LangSyncer compares to Lokalise. The short version: LangSyncer optimizes for developer speed on Laravel projects; heavyweight review pipelines are a different product category.

Gotchas

Verify placeholders after translating. The AI preserves {name} and :count, but always check; "Hola, {nombre}" instead of "Hola, {name}" will break at runtime, and it's a two-second check in review.
Re-translation isn't free. Running AI on the same text again consumes quota again. Edit the draft manually for small fixes instead of re-rolling.
If Translate Missing stops early, quota probably ran out mid-process. Everything completed before the stop is saved as drafts, and the AI Translation Jobs log shows the status of each job.

Start translating →