Comparamos idiomas de origen con idiomas de destino.

Comparamos is the first-person plural form of comparar.

It can mean:

• we compare in the present tense
• we compared in the simple past, depending on context

So by itself, comparamos is potentially ambiguous. In many neutral examples like this one, it is usually understood as we compare.

Spanish often leaves out subject pronouns because the verb ending already shows who is doing the action.

So:

• Comparamos = we compare
• Nosotros comparamos = also we compare, but with extra emphasis or contrast

In ordinary Spanish, especially in Spain, omitting nosotros is very normal.

Because the sentence is speaking about languages in general, not a specific set already identified.

So:

• Comparamos idiomas de origen con idiomas de destino = a general statement
• Comparamos los idiomas de origen con los idiomas de destino = sounds more specific, as if both groups are already known in the context

Spanish often leaves out the article with plural count nouns when talking in a general, broad way.

Because comparar commonly takes con when you mean to compare one thing with another.

So:

• comparar X con Y = to compare X with Y

This is one of the most standard patterns in Spanish.

You may also see:

• comparar X y Y = to compare X and Y

Both are correct, but comparar X con Y makes the relationship especially clear.

This is a very common Spanish structure: noun + de + noun.

Here:

• idioma de origen = source language
• idioma de destino = target language

Spanish often uses de phrases where English may prefer a noun used like an adjective.

Similar patterns are:

• país de origen
• lugar de destino
• fecha de salida

So this structure is very natural in Spanish.

Because in de origen and de destino, those words are part of a classification phrase, not simply matching the number of idiomas.

So Spanish treats them like labels:

• idiomas de origen
• idiomas de destino

This is normal. The idea is closer to languages of the source type and languages of the target type, not necessarily languages of origins or languages of destinations.

Yes, you could, but there is a slight difference in feel.

• idioma is very common for meaning language in general
• lengua is also correct, but can sound a bit more linguistic, academic, or formal in some contexts

So:

• Comparamos idiomas de origen con idiomas de destino sounds very natural
• Comparamos lenguas de origen con lenguas de destino is also possible, but less likely in many everyday or technical contexts

Also, lengua can mean tongue, so context matters.

Yes. In Spanish, the normal order is:

• noun + de + complement

So:

• idiomas de origen
• idiomas de destino

You cannot move de origen in front in the same way English sometimes uses a pre-noun modifier. Spanish does not usually build this kind of phrase the way English does in source languages or target languages.

Yes. If you were talking about one source language and one target language, you could say:

• Comparamos el idioma de origen con el idioma de destino

The plural idiomas suggests either:

• several languages, or
• a general statement about source and target languages as categories

So singular and plural both work, depending on what you mean.

Not completely by form alone. Comparamos can be either:

• present: we compare
• preterite: we compared

Only context tells you which one is intended.

For example:

• In a heading, description, or general explanation, it is usually read as present
• In a story about completed actions, it could be past

So this is a good example of how Spanish sometimes relies on context more than English does.