Which Ilocano to Tagalog Translator Is Best?

Picking a different tool changes less than people expect. On one measured phrase set, translating Ilocano into Tagalog scored higher than the reverse direction, and accuracy swung far more by subject matter — months and colours are handled well, family terms and everyday verbs are not — than by which translator produced it.

That is not a dodge. We ran the same 410 checked phrases through this site’s engine in both directions and scored every result against a human translation. The gap between the two directions was 8.6 points. The gap between the easiest and hardest subject matter was 65 points. Those are the two variables that decide whether you get a usable sentence, and neither of them is the tool.

Translation does not run equally well in both directions, even between the same two languages on the same phrases. Ilocano into Tagalog matched or came close 59.0% of the time. Tagalog into Ilocano, on the identical set, managed 50.4%.

So if you have a choice about which way to work — drafting in Ilocano and translating out, rather than writing Tagalog and translating in — take it. That single decision is worth more than any amount of comparing tools.

Accuracy is not one number. Across the 25 categories in our phrasebook it ranged from 26.7% to 91.7% — a spread of 65 points, far wider than any difference you are likely to find between one translator and another.

The pattern is consistent: the more concrete and closed the set, the better the machine does. Months and colours are finite lists with one obvious answer each. Family terms and everyday verbs carry relationship, register and politeness that has to be chosen rather than looked up, and that is where the output falls apart.

The most damaging failure, because nothing signals it went wrong. When the engine does not recognise an Ilocano word it echoes the input. Ten of our test phrases came back identical to what went in despite having a perfectly ordinary Tagalog equivalent.

A tool that echoes your input back at you looks exactly like a tool that translated it. Nothing in the interface distinguishes the two, which is why “which translator is best” is a harder question to answer by eye than it seems — the confident-looking answer and the wrong one are the same answer.

We ran the same test across 72 directions between Philippine languages and English. Not one of them cleared 70%. The strongest was Bikol → Tagalog at 68.6%; the weakest was Cebuano → Ilocano at 41.2%.

A ceiling that consistent across that many directions is telling you something about the available training data for these languages, not about any particular product. Changing tools does not move a limit that every tool shares. The full results are here, and why it happens is here.

• Translate out of Ilocano, not into it where you have the choice. Worth 8.6 points on our test set.
• Check anything that matters against a human-written phrase. Our 428-entry phrasebook was compiled from published references rather than generated, which is the whole reason it can be used to check the machine.
• Be most careful with people and courtesy. Family & people scored 26.7% — the lowest of any category, and the one most likely to cause offence when it is wrong.
• Treat an unchanged word as a failure, not a translation. If the output contains the Ilocano you typed, the engine did not recognise it.