Vauva oppii kävelemään.

Oppii is the 3rd person singular present tense of the verb oppia (to learn).

Because the subject vauva (baby) is singular, the verb is also singular:

• minä opin = I learn
• sinä opit = you learn
• hän/se oppii = he/she/it learns

So Vauva oppii means The baby learns / is learning.

After oppia, Finnish usually uses the third infinitive illative form to express learning to do something.

So:

• oppia kävelemään = to learn to walk
• oppia lukemaan = to learn to read
• oppia puhumaan = to learn to speak

This is the normal Finnish pattern. English uses to walk, but Finnish uses this special infinitive form instead.

Kävelemään is the third infinitive in the illative case of kävellä (to walk).

A simple way to think of it is:

• kävellä = the basic dictionary form, to walk
• kävelemään = a form used after certain verbs, including oppia, mennä, ruveta, and some others

In this sentence, it shows the activity that is being learned: walking.

Very roughly:

1. Start with kävellä
2. Use the verb stem kävele-
3. Add -mään (because of vowel harmony)

So:

• kävellä → kävele- → kävelemään

The ending is -mään, not -maan, because the word has front vowels like ä.

Vauva is the subject of the sentence, so it is in the nominative case, which is the basic form.

That is why it appears without any special case ending:

• vauva = baby
• Vauva oppii = The baby learns

This is the normal subject form in Finnish.

Finnish does not have articles like English a, an, or the.

So vauva can mean:

• a baby
• the baby

The exact meaning depends on context. In this sentence, English would usually translate it as The baby learns to walk or A baby learns to walk, depending on the situation.

It can often be understood either way, depending on context.

Finnish present tense is broader than English present tense. So Vauva oppii kävelemään can mean:

• The baby learns to walk
• The baby is learning to walk

If you want to stress that the process is happening right now, Finnish may also use other structures, but this simple sentence is perfectly natural.

A few key points:

• Stress is on the first syllable of each word.
• Double vowels are long:
  • oppii has a long ii
  • kävelemään has a long ää
• ä is a front vowel, somewhat like the vowel in British cat, but not exactly the same.

Very roughly:

• vauva ≈ VAU-va
• oppii ≈ OP-pii
• kävelemään ≈ KÄ-ve-le-mään

Also, Finnish pronunciation is usually very regular: you pronounce what you see.

Yes, Finnish word order is more flexible than English, but Vauva oppii kävelemään is the most neutral order.

This is the basic pattern:

• subject + verb + other element

So:

• Vauva oppii kävelemään.

Other word orders are possible for emphasis, but they may sound marked or poetic. For a learner, the normal order is the best one to use.

It is used for both.

Oppia means to learn, whether that means:

• learning information
• learning a language
• learning a skill

So it works naturally in sentences like:

• Lapsi oppii puhumaan. = The child learns to speak.
• Hän oppii suomea. = He/She is learning Finnish.
• Vauva oppii kävelemään. = The baby learns to walk.

So yes, it is completely natural here.