Lexiel: why an AI lawyer must know Spanish first

The problem with generic AI lawyers

When we started designing Lexiel, the first instinct was the obvious one: take a large model, feed it some legal texts, and call it "Memchats legal advisor". That's what almost every product in the space does. And it's why almost every one of them is useless for real cases.

The problem is structural: large LLMs are trained mostly on English text, and when they talk about "law" they're thinking Anglo-American common law. They'll tell you that you have "discovery rights", quote "case law" at you, and recommend things that in Spanish law don't apply or apply very differently.

How Lexiel is built

Spain runs on codified continental law. The Civil Code has numbered articles. Supreme Court rulings create doctrine, but the primary source is written law. A separated mother in Madrid doesn't need to know what happens with custody in California: she needs to know what art. 92 of the Civil Code says about joint custody and how the Audiencia Provincial of Madrid is interpreting it in 2025.

That's why Lexiel is built differently. It is aimed at Spanish law rather than an international average, and above all it enters the conversation with your whole history with that person already loaded: who said what, when, and what was promised. Lexiel points you at what deserves attention and how to raise it. It does not replace a lawyer and it does not verify the law for you.

The difference in practice

When you ask Lexiel "my ex wants to change the visitation schedule unilaterally", it does not answer with general "fairness" principles. It comes in with your history loaded: it finds where you agreed the schedule, on what date and in whose words, points out that a unilateral change contradicts what is already written down, and drafts your reply. What the law says is for your lawyer to confirm; what the two of you said is what Lexiel shows you.

That's the difference between "this is informational" and "this can serve as a basis for a negotiation or a brief to the court". It doesn't replace your human licensed lawyer (clear disclaimers) but it takes you 80% of the way and saves your lawyer hours of prep work.

The strategy is deliberate: we're building Lexiel for Spain first, and only then looking at Italy, Portugal, LATAM. Real verticals, not fake horizontals. A generalist legal advisor good for every country is really good for none.