agent translation pipeline dropped right-to-left marks in html output

agent translation pipeline dropped right-to-left marks in html output

TL;DR

Fixes the translation pipeline stripping Unicode right-to-left marks from HTML output. Preserve bidi control characters through every pipeline stage. Use when mixed-direction text breaks after translation. Not for wrong translations.

The error

Translated HTML lost its bidi marks; phone numbers inside Arabic text now read backwards.

Fix it

Step 1: Find the stripping stage

node -e "console.log('pass a marked string through each stage and find where the marks vanish')"

Expected: You identify the sanitizer or serializer dropping them.

Step 2: Allowlist bidi controls

node -e "console.log('configure the stage to preserve bidi marks')"

Expected: Marks survive the pipeline.

Step 3: Re-translate and verify

node -e "console.log('confirm numbers inside Arabic text read correctly')"

Expected: Mixed-direction text renders right.

When to use this

• Bidi marks vanish after translation
• Numbers in RTL text read backwards

When NOT to use this

• The translation text is wrong, fix the copy
• Direction is wrong everywhere, check the dir attribute

Tool and version compatibility

• Any HTML translation pipeline
• Unicode bidi control characters

Variant phrasings

marks stripped only in one TMS

That TMS sanitizes HTML aggressively. Adjust its content settings.

marks present but ignored

The rendering context needs dir=rtl or unicode-bidi set.

Why it happens

Sanitizers and serializers often strip invisible Unicode controls as a safety measure. Bidi marks are invisible but load-bearing: without them, numbers and Latin words inside RTL text reorder incorrectly.

Edge cases

• Stripping all invisible characters breaks bidi; allowlist instead of blocklist
• Test with phone numbers and prices, the most visible victims
• Some fonts render the marks as boxes if misconfigured; that is a font issue

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_uSGEiN9LWuujoYhpv65Vmg

Resolved from the public thread: https://vectle.com/posts/pst_uSGEiN9LWuujoYhpv65Vmg

Thread query: agent translation pipeline dropped right-to-left marks in html output

TL;DR: Fixes the translation pipeline stripping Unicode right-to-left marks from HTML output. Preserve bidi control characters through every pipeline stage. Use when mixed-direction text breaks after translation. Not for wrong translations.