Ni ina da muradin in yi tafiye-tafiye a duniya in ga yadda mutane ke rayuwa.

In Hausa, Ni and ina are not doing exactly the same job, even though both relate to “I”.

• Ni is an independent pronoun: “I / me”.
• ina here is part of the verb phrase ina da = “I have”.

So:

• Ina da muradi… = “I have a desire…”
• Ni ina da muradi… = “As for me, I have a desire…”

Adding Ni puts a bit of emphasis or contrast on the subject:

• Ni ina da muradin… – “I, personally, have the desire… (maybe others don’t).”
• Ina da muradin… – a plain statement, “I have the desire…”

You can drop Ni and the sentence is still correct Hausa, just slightly less emphatic:
Ina da muradin in yi tafiye-tafiye a duniya in ga yadda mutane ke rayuwa.

In this context:

• ina = “I am (in a state of)”
• da = “with”

Literally, ina da is like saying “I am with …”, which is how Hausa typically expresses possession.

Examples:

• Ina da kudi. – “I have money.” (literally “I am with money.”)
• Ina da yara uku. – “I have three children.”
• Ina da muradi. – “I have a desire.”

So Ni ina da muradin… = “I have the desire…”

The base noun is muradi = “desire, wish, ambition”.

When muradi is followed by another word that it “owns” or governs, it usually takes a linking -n (a genitive/possessive linker), forming muradin:

• muradin in yi tafiye-tafiye
  literally: “the desire of (that) I (should) do travels”

This -n is like the “of” in English when you say “the desire to travel / of travelling”. In Hausa, muradin + clause is a very natural way to say “the desire to do X”:

• muradin in karanta Hausa – the desire to study Hausa
• muradin in taimaki mutane – the desire to help people

• yi is “to do / to make”.
• in here is a subjunctive marker meaning roughly “that I (should)…”.

So:

• muradin in yi tafiye-tafiye
  ≈ “the desire that I should do travels” → “the desire to travel”.

in yi is not a future tense; it’s more like an intended or desired action, often after verbs or nouns of wanting, needing, etc.

Compare:

• Zan yi tafiye-tafiye. – “I will travel.” (future fact / plan)
• Ina da muradin in yi tafiye-tafiye. – “I have the desire to travel.” (talks about your wish, not about a decided plan)

So in marks a subordinate clause of desire/purpose, not simple future.

Hausa often uses reduplication (repeating a word or part of it) to show:

• plurality
• repeated / frequent actions
• a more general or broad sense.

Here:

• tafiya (also tafiyayya in some dialects) = a (single) journey / trip.
• tafiye-tafiye = trips, travels, travelling around (more than one, or in general).

So:

• Ina son tafiya. – “I like (going on) a trip / travelling (in general, but grammatically singular).”
• Ina son tafiye-tafiye. – “I like travelling around / going on (various) trips.”

In your sentence, in yi tafiye-tafiye a duniya suggests multiple journeys / travelling around the world, not just one trip.

• duniya = “the world”.
• a is a preposition usually meaning “in / at / on (a place)”.

So a duniya = “in the world” / “around the world / worldwide” depending on context.

Examples:

• a gida – at home, in the house
• a kasuwa – at the market
• a duniya – in the world

In this sentence, in yi tafiye-tafiye a duniya ≈ “to travel (around) the world”.

ga can be two different things in Hausa:

1. As a verb: contracted form of gani = “to see”.
2. As a preposition: “to, towards, here is/are”.

Here, it is the verb “see”:

• in = subjunctive “that I (should)”
• ga = see

So in ga = “that I (may) see” / “to see”.

Full sequence:

• in yi tafiye-tafiye a duniya in ga yadda mutane ke rayuwa
  = “to travel around the world to see how people live.”

You can say:

• …in yi tafiye-tafiye a duniya don in ga yadda mutane ke rayuwa.

Here, don or domin means “in order to / so that / for the purpose that”.

But Hausa often omits don/domin when the subjunctive clause already clearly expresses purpose, especially when you have a sequence of in + verb:

• in yi … in ga … = “to do … to see …”

So both are correct:

• in yi tafiye-tafiye a duniya in ga yadda… (more streamlined)
• in yi tafiye-tafiye a duniya don in ga yadda… (makes the purpose even more explicit)

The meaning is practically the same: “travel the world in order to see how people live.”

yadda means “how, the way that, the manner in which”.

It introduces a clause describing manner:

• yadda mutane ke rayuwa = “how people live / the way people live”.

You see yadda often with verbs of seeing, knowing, etc.:

• Na ga yadda yake aiki. – I saw how he works.
• Ina son sanin yadda kake rayuwa. – I want to know how you live.

So the part in ga yadda mutane ke rayuwa literally is “that I (may) see how people live.”

Both suna and ke are aspect markers that can go with a verb like rayuwa:

• mutane suna rayuwa – “people are living / people live”
• mutane ke rayuwa – also “people live / are living”

But they are used in different structures:

• suna is the plain progressive/habitual: “are doing / usually do”.
• ke is often used in focus constructions or relative-like clauses, including those introduced by yadda, inda, lokacin da, etc.

Because your clause is embedded under yadda (“how”), Hausa prefers ke here:

• yadda mutane ke rayuwa – how people live / the way people live.

If you say yadda mutane suna rayuwa, it can be understandable, but ke is more natural and grammatically aligned with this kind of “how/where/when” clause.

rayuwa can function as both:

• as a noun: “life”
• as a verbal noun / continuous verb form: “living, to live”

Here, with an aspect marker ke, it functions as a verb:

• mutane ke rayuwa – people are living / people live.

Compare:

• Rayuwa ba ta da sauki. – Life is not easy. (noun)
• Mutane ke rayuwa a wannan gari. – People live in this town. (verb-like use)

So in yadda mutane ke rayuwa, it’s best understood as “how people live”.

Yes. That sentence is perfectly correct and very natural.

• Ni ina da… – slightly more emphatic or contrastive: “As for me, I have…”
• Ina da… – neutral statement: “I have…”

Use Ni if you want to highlight yourself in contrast to others, or if it’s the start of a more personal statement:

• Ni ina da muradin… – “Me, I have the desire…”

In everyday conversation, many speakers would simply say:

• Ina da muradin in yi tafiye-tafiye a duniya in ga yadda mutane ke rayuwa.

Yes, you could say:

• Ina da burin in yi tafiye-tafiye a duniya…

buri (linking form burin) also means “aim, goal, ambition, aspiration”.

Nuance:

• muradi – more general desire / wish, can be big or small.
• buri – often a bit stronger, more like a life goal / ambition.

So:

• muradin in yi tafiye-tafiye… – “the desire to travel…”
• burin in yi tafiye-tafiye… – “the ambition / goal to travel…”

Both are natural; buri can sound a bit more serious or long-term.