I have a problem with document included different font.

I mostly translated Palī language.
That is a ancient language.
It is only used in Buddhism tradition.

This language is expressed with the Roman alphabet and specific modified the Roman alphabet(āīūĀŪĪṇṁṃñ).

A long vowel is expressed like this(āīūĀŪĪ)

Palī language have a lot of related font.
Problem is started here.

In my common window enviroment, when i use some font, there is no problem to see palī language.

e.g
Yo pana bhikkhu bhikkhūnaṃ sikkhāsājīvasamāpanno sikkhaṃ appaccakkhāya dubbalyaṃ anāvikatvā methunaṃ dhammaṃ paṭiseveyya, antamaso tiracchānagatāya pi; pārājiko hoti, asaṃvāso

You can see Rome text with some strange text(ṃīā)
There is no problem.

But see below.

Bhikkhupátimokkha
Saòghádisesa 1
Saòghádisesa 8

Those are not right expression.
There are some broken font.
If there is any problem,
á is originally ā.
ò is originally ṅ.
á and ò are broken text.

I don't know exactly the mechanism about window font.
Anyway my 'default font'(?) can not rightly show some palī text.

So, I should have some document preprocessing.
e.g

1. open PDF by MS_WORD
2. change broken text one by one.(Ctrl+H,select ò change to ṅ)

Here, I can change font in Trados option.
But If I change font, I may counter some other problem also.

→ I can not use TM and TB which contains 'default font'(can read rightly in window default environment*). *I already say I don't know exact mechanism about font. This is my expression.

So, I have to select default font.
If I do not unify TM or TB. I have to make two different TM or TB(which is comfortable each font)

What would you do if you were me?

Maybe this is not a common problem.
But I think some traslator can counter problem like me.

Is this a best to change broken text one by one?

abstract
1. My source language is broken in some font.
2. Because it has a lot of different font.
2. Is there any method to see font rightly in default font(?) =How to deal the broken text(font)?

I think this is almost common issue, not a trados's. But any ideas you could give me would be greatly appreciated.

By the way I had selected English(United Kingdom) as source language of palī. I think there is no problem.