AI Translation from English to Frisian Translation

How good is AI translation from English to Frisian?

Two or more solutions meet every Basic requirement in Frisian only as three-step solutions (translation + LQA + repair).
Only the three-step solution (translation + LQA + repair) on Google Gemini 3.1 Pro Preview meets every Standard requirement in Frisian.
Only the three-step solution (translation + LQA + repair) on Google Gemini 3.1 Pro Preview with the gender-neutrality agent meets every Advanced requirement in Frisian.
The only solution that meets every Standard requirement costs $560 per million characters and takes 281 seconds per 1,000 words.

A solution is a model plus its harness: prompts, glossaries and other context, pre- and post-processing. It meets a quality level when it meets every requirement of the level.

Requirement	Description	Met when
Basic requirements for any company
General translation quality	Translation errors of every type, such as mistranslations, omissions and grammar errors, classified by type and severity following MQM, the industry standard.	No critical error, at most 3 major errors in the four test texts (3,034 words) and at most 20 errors per 1,000 words, weighted by severity (minor 1, major 5, critical 10).
Standard requirements adds the rules companies set for their content
Terminology	The approved translation of every glossary term, in any of its correct forms.	100% of the glossary terms. We test it in the 16 languages with a glossary, so it does not apply in Frisian.
Tone of voice	The formal register (jo) in every sentence in the second person or the imperative.	100% of those sentences.
Tags	Every HTML tag of the source, with its attributes, in the translation.	100% of the tags.
Unicode character integrity	Every character intact, with no corrupted characters and no letter from another script that only looks like the right one.	100% of the characters.
Locale conventions	The punctuation marks of the target language in place of the English ones.	No pass-or-fail bar. We report it as a share, because whether to localize punctuation is a matter of house style.
HTML entities	No HTML character code, such as the code for a quotation mark, that the source does not carry.	No added HTML entity.
Valid JSON	The translated JSON document still parses.	The document parses.
Spacing at tag boundaries	The spaces next to HTML tags stay as in the source.	100% of the tag boundaries.
Advanced requirements adds a requirement for some companies and use cases
Gender neutrality	A gender-neutral translation wherever the English source leaves the gender of a person open, as in “your manager” or “the expert”.	100% of the sentences that refer to a person.

Find English to Frisian translation solutions for your requirements

Pick a quality level, or your own requirements, bars and constraints, to see the shortlisted solutions that meet them in Frisian, with a column for each requirement you select. Under Optimize for, choose which of them comes first: the one with the fewest total errors, the lowest cost or the shortest time. Click a column heading to sort by it.

The shortlisted solutions on 13 models, with their Intento LQA results. Total errors per 1,000 words add the weighted general translation quality errors (minor 1, major 5, critical 10) to the missed glossary terms, sentences in the wrong register, tag errors and sentences that fail gender neutrality, each counted once. Formatting counts as met or missed and does not add to the total errors. The models that did not make the shortlist have automatic scores only: the shortlist. Inconclusive: the three LQA judges agree on fewer than 90% of the sentences of the solution, so it has no general translation quality result (09-02). Gender neutrality: the Advanced requirements count the two best solutions of the language, with the gender-neutrality agent where they need it. The results of the other solutions are shown for information.

How we measure it: 11-01 · 11-02

Trade-offs in English to Frisian translation

Trade-off

For the Basic requirements, Optimize for selects the three-step solution (translation + LQA + repair) on OpenAI GPT-5.5 for quality, with 10.6 total errors per 1,000 words. For cost and latency it selects the one on Google Gemini 3.1 Pro Preview. It has 16.8 total errors per 1,000 words, but costs $560 instead of $581 per million characters and takes 281 instead of 320 seconds per 1,000 words.

Constraints

None of the one-step or two-step solutions meet general translation quality in Frisian, and every level includes it. So meeting any level takes three steps. Every solution that meets the Basic requirements costs $560 per million characters or more and takes 280 seconds per 1,000 words or more. None of the three real-time solutions (<2 sec) on the shortlist have a conclusive Intento LQA result.

Agent effect

For the Advanced requirements, the gender-neutrality agent raises the cost of the three-step solution on Google Gemini 3.1 Pro Preview from $560 to $964 per million characters. The time rises from 281 to 301 seconds per 1,000 words. Weighted errors fall from 16.5 to 14.2 per 1,000 words. With the agent the solution has no major error, against two without it. On OpenAI GPT-5.5, the solution with the agent does not meet every Advanced requirement. It has 12.2 total errors per 1,000 words, against 10.6 without it.

English to Frisian translation quality levels

Frisian is in tier 2 (two or more solutions, none simple) for the Basic requirements and in tier 3 (one solution) for the Standard requirements, because only one solution meets every Standard requirement.
A solution meets general translation quality with no critical error, at most three major errors and at most 20 weighted errors per 1,000 words.

Optimize for

Basic requirements☆☆

Tier 2: two or more solutions, none simple

Solutions that meet them: 2 (0 one-step)
Simplest solution: three-step

Fewest errors

OpenAI GPT-5.5
three-step

Total errors per 1,000 words: 10.6
Cost per million characters: $581
Seconds per 1,000 words: 320

Lowest cost