Teams often ask us where to start with multilingual websites. Below is the short version we share with app developers preparing for Japan and Korea.
Local trust signals
Visitors in Japan and Korea look for local payment methods, currency, delivery or support hours, and reviews in their language. Add these before you add more languages. Trust signals affect both conversion and how AI assistants describe your company in that market.
Ads and landing pages in the same language
If your campaigns in Japan and Korea run in the local language but the landing page is in English, conversion drops and ad review may flag the mismatch. Plan translations around campaign calendars, translate the offer, form labels and error messages, and test the checkout in that language. AI assistants also quote the language version that matches the question, so a complete local page helps GEO as well.
Measuring each version
Segment analytics by language folder or subdomain, track conversions per version, and compare ad performance by landing page language. If a version gets traffic but no conversions, review the offer and payment options before blaming translation quality.
Maintenance
Assign an owner for each language. When the source page changes, flag translations as stale and update within a fixed number of days. Run a monthly crawl to catch broken alternates, missing pages and mixed-language templates.
Choosing a CMS and URL pattern
Subfolders such as /de/ or /ja/ are the simplest to maintain and inherit domain authority; subdomains suit teams that run separate stacks per market; country domains carry the strongest local signal but cost the most to run. Whichever pattern you choose, keep it consistent, avoid query-string language switches, and make sure the language selector links to the equivalent page rather than the home page. For app developers, WordPress or a headless CMS with a translation plugin is usually enough for the first three languages.
hreflang and URL structure
Use one URL per language version, link each version to all others with hreflang, include return tags, and set an x-default. Avoid automatic IP redirects that hide versions from crawlers. Our guide covers common errors: AI website building service.
Plan languages by market, not by habit
For app developers, the first translated version should follow revenue potential and ad plans. If your next campaigns target Japan and Korea, translate the pages those ads land on first: home, product, pricing, checkout and support. A site that is half translated converts worse than a smaller site that is fully translated.
Takeaway
None of this is complicated, but it has to be done in order. Facts and tracking first, scale second.
Written by the PandaWM team in Hong Kong. PandaWM helps overseas-facing companies with GEO / AI search visibility, ad account opening and management on Facebook, Google, TikTok and about 20 smaller networks, multilingual websites, AiChatSale and a crypto payment gateway that serves overseas merchants only.