Хоть правило и сложное, оно помогает говорить точнее.

Here хоть means although / even though. It introduces a contrast:

• Хоть правило и сложное, оно помогает...
• Although the rule is complicated, it helps...

In this sentence, хоть is not the everyday meaning at least or even. It is being used as a concessive conjunction: it introduces something that is true, but does not change the main result.

This is a very common Russian pattern:

• хоть ... и ...
• хотя ... и ...

It means something like although ... still ... or even though ....

So in:

• Хоть правило и сложное...

the и helps mark the adjective phrase сложное as part of that concessive structure. English does not need a direct equivalent, so you usually do not translate it separately.

You can think of the pattern as:

• Хоть X и Y, Z
• Although X is Y, Z

Because сложное agrees with правило.

The noun правило is:

• neuter
• singular
• nominative

So the adjective must match it:

• сложное правило = a complicated rule

If the noun were masculine, you would get сложный:

• сложный текст

If it were feminine, you would get сложная:

• сложная тема

Оно refers back to правило:

• правило = it
• оно помогает = it helps

Russian often uses this kind of pronoun in the main clause after a subordinate clause:

• Хоть правило и сложное, оно помогает говорить точнее.

This is very natural and clear.

Could it be omitted? Sometimes Russian can omit pronouns, but here оно sounds normal and helps the sentence flow. Without it, the sentence would feel less complete:

• Хоть правило и сложное, помогает говорить точнее — possible in some contexts, but less neutral and less standard here.

So for a learner, it is best to treat оно as the normal form.

Because the first part is a subordinate concessive clause:

• Хоть правило и сложное
• Although the rule is complicated

The second part is the main clause:

• оно помогает говорить точнее
• it helps you speak more precisely

Russian normally separates these with a comma, just like English often does with although clauses.

Russian often uses помогать + infinitive to mean to help someone do something.

So:

• помогает говорить = helps [someone] speak

The sentence does not explicitly say кому it helps; the idea is general:

• it helps one speak more precisely
• it helps people speak more precisely

This is a very common structure:

• Это помогает понять тему. = This helps [you/us/people] understand the topic.
• Музыка помогает работать. = Music helps [you] work.

Because точнее is the comparative form of the adverb точно:

• точно = precisely / accurately
• точнее = more precisely / more accurately

Here it modifies говорить:

• говорить точно = to speak precisely
• говорить точнее = to speak more precisely

It is not точный, because точный is an adjective and would describe a noun, not the verb говорить.

So:

• точный ответ = an accurate answer
• отвечать точно = to answer accurately

Yes, in this sentence хоть and хотя are very close in meaning.

You could also say:

• Хотя правило и сложное, оно помогает говорить точнее.

That is perhaps a little more neutral or standard in careful writing. Хоть can sound slightly more conversational or lighter, but both are correct.

So for this sentence:

• хоть = although / even though
• хотя = although

Yes. Russian word order is flexible, and you may see variations such as:

• Хоть и сложное правило, оно помогает говорить точнее.
• Хотя правило и сложное, оно помогает говорить точнее.

All of these are understandable. The original version is very natural.

The exact word order can slightly change emphasis:

• Хоть правило и сложное... emphasizes the rule
• Хоть и сложное правило... emphasizes the fact that it is complicated

But the overall meaning stays the same.

Here it means although / even though, not even if.

Why? Because the sentence presents правило сложное as a real fact:

• the rule is complicated

If Russian wanted a stronger even if idea, the structure would usually look different and would often describe a hypothetical situation.

So in this sentence:

• Хоть правило и сложное = Although the rule is complicated
• not Even if the rule were complicated

More or less, yes. Literally:

• говорить = to speak
• точнее = more precisely / more accurately

In natural English, you would usually say:

• to speak more precisely
• to express oneself more accurately

So the idea is that the rule helps make speech more exact and clear.