How to Translate Substack From Spanish to Vietnamese (Step-by-Step)

Spanish-language content on Substack is rich and worth reading. If Vietnamese is your stronger reading language, the usual friction applies: copy the text into a translator and lose the layout, or read slower than you would like.

This guide shows a third option — translate the Spanish newsletter in place, directly into Vietnamese, with bilingual translation. The Spanish stays visible and the Vietnamese meaning appears right beside it, so you can read the meaning quickly and still check the original for any word, name, or phrase.

Demo note: the screenshots below are built in a real Substack layout to show exactly how BothLang displays a bilingual page — the Spanish paragraph on top and the translated Vietnamese directly beneath, with a hand-drawn arrow pointing at the translation.The workflow is identical on any newsletter because BothLang works on whatever page you are viewing.

What you need

• BothLang installed in Chrome, Edge, or Firefox — see the download page.
• The extension pinned to your toolbar.
• A Spanish-language newsletter open in a tab.

Step 1 — Open the Spanish newsletter

Open the Spanish piece you want to read.

Step 2 — Set Vietnamese as your target

Click the BothLang icon. Set Translate into to Vietnamese and Page display to Bilingual.

Step 3 — Translate the page

Click Translate Now. BothLang places a Vietnamese translation directly beneath each Spanish paragraph, leaving the Spanish intact. A hand-drawn arrow marks the first translated paragraph.

Step 4 — Switch reading modes

• Bilingual — source and translation together.
• Translation only — fastest.
• Original only — back to clean Spanish.

The short version

1. Install and pin BothLang.
2. Open a Spanish newsletter.
3. Set Translate into: Vietnamese, Page display: Bilingual.
4. Click Translate Now.
5. Read the Vietnamese with the Spanish original underneath.

Try it on your next Spanish-language newsletter.