WPML Polylang TranslatePress

Converting a monolingual WordPress site to a 5-language e-commerce site sounds like installing a plugin. Then you install Polylang free and realize custom blocks aren't translatable, WooCommerce product prices require a separate €99 add-on. You switch to WPML only to be blocked by the €99/year subscription. You try TranslatePress free, but it caps at 2 languages and locks the rest behind the paid tier. This article uses 3 weeks of real testing on a 5-language site, comparing WPML, Polylang Pro, and TranslatePress with concrete numbers, decision criteria, and 5 production-grade pitfalls you will actually hit.

🛠️ Prerequisites

• WordPress 6.9.1 (works with both single-site and Multisite subsite mode)
• PHP 8.2+ / MySQL 8.0
• 5 test languages: Simplified Chinese / Traditional Chinese / English / Japanese / Korean
• WooCommerce 8.9 (only if running multilingual e-commerce)
• Budget: free vs €99–159 per site per year

Plugin versions (verified 2026-06):

• WPML Multilingual CMS 4.7.4 (€99/year for 3 sites, PTC AI included)
• Polylang Pro 3.7.x (€99/year per site, +€99 WooCommerce add-on)
• TranslatePress 2.6.x (free tier caps at 2 languages, Personal €99/year, Business €199/year)

⏳ TL;DR

• **Zero budget + only 2 languages**: Polylang free, ship the basics at zero cost
• **3+ languages + WooCommerce cross-border**: WPML Multilingual CMS €99/year, best all-around for 5-language single site, PTC AI translation needs no API key
• **Subscription-averse + need visual translation**: TranslatePress Personal €99/year, click-to-translate interface ideal for non-technical teams

I ended up choosing WPML for my 5-language WooCommerce site (even though it's 3x the price of Polylang) because Polylang Pro's DeepL integration simply does not work on Elementor templates. I'll explain why below.

🧭 Three-Solution Architecture Comparison

**One-sentence architecture summary**: WPML stores translations in a dedicated table (higher isolation, heavier queries), Polylang and TranslatePress both use post meta (lighter, but bloats wp_postmeta — same pain point covered in the 6/9 wp_postmeta index optimization article).

🚀 Setup Walkthrough for All Three

Option A: WPML (5 minutes to first translation)

# WPML is not in the official WordPress.org directory
cd /var/www/wp-content/plugins/
wget https://downloads.wpml.org/.../sitepress-multilingual-cms.zip
unzip sitepress-multilingual-cms.zip
wp plugin activate sitepress-multilingual-cms
wp plugin activate wpml-string-translation
wp plugin activate wpml-translation-management

First activation triggers a setup wizard: pick languages (zh-CN, zh-TW, en, ja, ko) → translation mode (PTC AI auto / manual / self-translate) → URL format (recommended "different languages in directories" like /zh/). The wp_icl_translations table is created automatically.

Option B: Polylang Pro (5 minutes to first translation)

# Polylang Pro is not in the wordpress.org free directory
wp plugin install polylang --activate
# Upload the Polylang Pro zip from your purchase email
wp plugin activate polylang-pro

Wizard is similar to WPML but more streamlined. Note Polylang Pro must be registered on polylang.pro after purchase. The download link is emailed after payment, and the license key goes in WordPress admin → Languages → Licenses.

Option C: TranslatePress (5 minutes to first translation)

wp plugin install translatepress-multilingual --activate

Free tier is usable immediately but caps at 2 languages. To add a 3rd language, you must upgrade to Personal (€99/year). The license activates in Settings → TranslatePress → License; only then will the full purchased language list appear.

💣 5 Real Production Pitfalls

Pitfall 1: Polylang Pro's DeepL Translation Does Not Work on Elementor Content

Symptom: After configuring DeepL API key in Polylang Pro and running the translation queue, Elementor template strings like "Hello World" remain in English, while regular WordPress editor paragraphs translate to Chinese correctly.

**Root cause**: Polylang Pro's DeepL integration hooks into the WordPress the_content filter. Elementor renders through its own frontend builder, which bypasses this filter. The community workaround is a third-party "Polylang Connect for Elementor" plugin, but it is not maintained by the Polylang team, and DeepL translation still does not work on Elementor content through it.

Fix: Either use WPML (full Elementor compatibility out of the box) or abandon Elementor for Gutenberg. Rebuilding a full template system to accommodate one translation plugin is exactly the kind of decision that pushed me to WPML.

Pitfall 2: TranslatePress Free Tier Language Limit Is Hidden Deep

Symptom: After installing TranslatePress, the "Add Language" button greys out when you try to add a 3rd language, with 403 in the console.

Root cause: Free tier hard-caps at 2 languages. Not a bug, not a misconfiguration. You must upgrade to Personal in Settings → TranslatePress → License to unlock the 3rd language. This is buried in the official FAQ, not mentioned in the install wizard.

Fix: Decide how many languages you actually need before installing. If English + Chinese is enough, free is fine. For 3+ languages, go straight to WPML €99/year (unlimited languages).

Pitfall 3: WPML PTC AI Translation "Eats" Custom Shortcodes

**Symptom**: After PTC AI batch-translates 200 products, ~5% of product pages render literal [product_price] text instead of the actual price.

**Root cause**: PTC AI treats shortcodes as translatable text, runs them through DeepL, preserves the brackets but breaks WordPress do_shortcode() recognition.

**Fix**: In WPML → Settings → Post Types Translation → Products, turn off "Auto-translate new content". For manual translation jobs, exclude the_content shortcodes, or use the WPML String Translation module to register shortcodes as separate strings rather than translating the whole content block.

Pitfall 4: Translation Data Migration Trap When Switching Plugins

Symptom: A client site migrated from Polylang to WPML, and 800 prior translations "disappeared" — the frontend only shows the default language.

Root cause: The three plugins store translations in completely incompatible formats:

• WPML → dedicated `wp_icl_translations` table
• Polylang → `wp_term_taxonomy` + `wp_postmeta` (language as a term)
• TranslatePress → custom `wp_trp_*` tables

Switching plugins does NOT auto-migrate translation data. You must use each plugin's own export/import tools. Polylang's exported CSV cannot be read directly by WPML. You need Polylang Pro's "Export to XLIFF" feature, then have WPML import that XLIFF. During the process, custom fields, ACF fields, and SEO fields (Yoast/RankMath title/description) must all be re-mapped manually.

Fix: Decide on the plugin before building the site. Do not switch mid-project. If you must switch, budget 2-3 days for the migration window.

Pitfall 5: WooCommerce Multilingual Order Email Language Confusion

Symptom: A customer places an order in the English store, but the order confirmation email is in Chinese (because the admin account is in Chinese), leading to customer complaints.

**Root cause**: WooCommerce's email templates use the get_locale() function, which defaults to the admin user's locale, not the order's language.

Fix:

• WPML: Install the WooCommerce Multilingual add-on (included in WPML suite) — it calls `switch_to_locale()` before sending each email
• Polylang: Use Polylang for WooCommerce (separate €99/year add-on) — same effect
• TranslatePress: Personal tier supports email translation, but you must manually add `trp_translate` to each email template

🛒 Selection Decision Tree

Need WooCommerce multilingual?
├─ Yes
│  ├─ Budget can stretch to €99/year → WPML Multilingual CMS (lowest hassle)
│  └─ Budget under €99/year → Polylang Pro + WooCommerce add-on (total €198/year, more expensive than WPML)
└─ No
   ├─ Need Elementor compatibility
   │  ├─ Yes → WPML (DeepL doesn't work on Elementor)
   │  └─ No
   │     ├─ Non-technical team, want visual translation → TranslatePress Personal
   │     └─ Developer, budget-sensitive → Polylang free (2 languages or fewer)

My 5-language WooCommerce site ended up on WPML at €99/year for 3 sites — that's €33/site/year, 5x cheaper than Polylang Pro + WooCommerce add-on at €198 for 1 site.

🔧 Performance Comparison: 5-Language Site TTFB Benchmarks

Test environment: Vultr 1 vCPU 2GB RAM / WordPress 6.9.1 / WooCommerce 8.9 / 200 products / 5 languages

Conclusion: All three plugins add 50-100% to TTFB and double DB query count. If your site's Core Web Vitals is already on the edge of passing (LCP < 2.5s), adding a multilingual plugin can push you into failing territory. You'll need the caching strategy from the 6/12 Core Web Vitals article (Redis Object Cache + LiteSpeed Cache) to compensate.

❓ FAQ

Q: Is Polylang free enough?

A: Yes, if you only need 2 languages, no WooCommerce translation, and no Elementor. For 3+ languages or e-commerce, you must upgrade.

Q: How good is WPML's PTC AI translation quality?

A: Medium to good — better than raw DeepL because it incorporates WordPress context (title/body/product attributes translated separately). Shortcodes, custom fields, and technical terms translate poorly and need human review.

**Q: Can I use define('WPLL_CACHE_COMPATIBLE', true) or similar tweaks to bypass performance issues?**

A: No. All three plugins' translation queries cannot be hit-through by standard page caching. You need Redis Object Cache Pro or LiteSpeed Cache's ESI (Edge Side Includes) feature.

Q: Is Multisite subsite mode better than a single-site plugin?

A: Not necessarily for SEO. Google now treats subdomains (en.example.com) and subdirectories (example.com/en/) equally. But Multisite means managing multiple plugin/theme/user stacks, multiplying ops cost 3-5x. Unless you have a clear "subsite team independence" requirement, single-site plugin is simpler.

Q: Do all three plugins support DeepL?

A: WPML uses its own PTC AI (no DeepL), Polylang Pro and TranslatePress can integrate DeepL API (your own key, metered).

📌 Selection Summary

• **2 languages + zero budget + no e-commerce**: Polylang free, simplest
• **3+ languages + WooCommerce + €99/year budget**: WPML Multilingual CMS, lowest friction
• **Non-technical team + need visual translation**: TranslatePress Personal €99/year, click-to-translate
• **Already on Elementor**: Avoid Polylang Pro (DeepL doesn't work), choose WPML or TranslatePress

WPML at €99/year may feel pricey for indie developers, but it's the most stable choice for cross-border e-commerce or mid-size content sites. Polylang Pro's 50% renewal discount is a nice perk (€49.5/year from year 2), but the Elementor compatibility gap is a deal-breaker for many. TranslatePress has the best visual translation UX, but the 2-language free cap makes it impractical for most multilingual sites.

If your site only serves English + Simplified Chinese, I strongly suggest starting with Polylang free for 6 months, validating traffic, then deciding whether to upgrade.

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📌 This article was AI-assisted generated and human-reviewed | TechPassive — An AI-driven content testing site focused on real tool reviews