The most cost-effective approach is usually:

1) Produce one master video

Create a single “base” version with:

• neutral visuals
• minimal on-screen text
• no region-specific references
• clean scene structure so it can be reused

This keeps your expensive work to one asset instead of making separate videos from scratch.

2) Localize with modular layers, not full regeneration

Use the text-to-video platform to swap only the parts that need localization:

• voiceover / narration
• subtitles
• on-screen titles and CTAs
• logo/tagline if needed
• a few region-specific shots only when necessary

This is much cheaper than regenerating the whole video for each language.

3) Build from a single reusable script template

Write the script in a way that can be translated cleanly:

• short sentences
• avoid idioms and slang
• keep time per segment consistent
• leave placeholders for localized terms, prices, dates, and legal text

That reduces rework and generation failures.

4) Use AI dubbing + subtitles instead of re-rendering scenes

If the platform supports it, the cheapest localization path is often:

• keep the same video
• generate translated captions
• dub the audio with AI voices in target languages

Only create new visual variants if language appears on-screen or if cultural differences matter.

5) Localize at the template level

Create one video template with:

• dynamic text fields
• variable assets
• language-specific audio tracks
• brand-safe layouts that can accommodate longer translations

Then generate variants automatically from one template.

6) Prioritize markets

Don’t localize into every language equally. Use a tiered approach:

• Tier 1 markets: full dubbing + subtitles + localized text
• Tier 2 markets: subtitles only
• Tier 3 markets: captions or light edits

This gives the best ROI.

7) Avoid expensive re-generation by planning for translation expansion

Some languages take more space than English. Design for:

• longer text
• different line breaks
• right-to-left scripts if relevant
• font compatibility

This avoids costly fixes after generation.

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Cheapest practical workflow

1. Create master video in English.
2. Export clean text blocks and timestamps.
3. Translate script once.
4. Auto-generate subtitles and AI voiceover per language.
5. Swap only on-screen text and end cards as needed.
6. Use the same visual edit for all locales unless a market requires cultural changes.

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If you want the lowest possible cost

The most economical combo is usually: single master video + translated subtitles + AI dubbing + minimal text replacement

That gives you localized variants without paying for full scene regeneration.

If you want, I can also give you:

• a cost-ranked localization strategy by budget
• a workflow for Runway / Pika / Synthesia / HeyGen / similar tools
• a template script optimized for localization