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The second version is not a one-off cost.

Firms price the first Arabic draft and then absorb six amendments without noticing. Over a three-year agreement with six amendments the routes separate by 13,740 — and they separate by far more than that in what happens when one goes wrong.

Three routes, a three-year agreement with six amendments

Cost is the easy column. The last one is the one that decides it.

Machine-aligned, associate checks comes to 3,660 against 17,400 for bilingual associate, in-house. That saving is real and it is not the reason to choose it — the reason is the four-hour turnaround, because a version that lags the English by a week is where drift gets in.

Four things firms find out late

The second is the one that produces the drift the other page is about, and it is a process failure rather than a translation one.

The amendment cost is the real cost
Everyone prices the first version. Over a three-year agreement with six amendments, amendments are where most of the spend and nearly all of the drift accumulate.
Nobody re-checks the whole document
An amendment gets translated and inserted. Whether the defined term it uses still matches the other forty uses is a question nobody asks, because asking it means reading both versions again.
The cheapest route has the worst tail
That is not an argument against it. It is an argument for knowing which risk you bought, and for spending the saving on a check rather than banking it.
Turnaround decides more than price
A five-day turnaround on an amendment means the Arabic lags the English for a week on every round. Most drift enters during exactly that window.

Where this comparison stops

The first line is the condition on the whole table.

The check is not optional
The assisted route is priced with an associate reading the output. Priced without one it is cheaper still and it is a different product, and firms that quietly drop the check should not describe themselves as using this.
These are our numbers, not yours
Rates, amendment volume and how bilingual your team already is will move all three columns. The shape holds; the figures are a starting point for your own version of this table.
Some documents should never be machine-aligned first
A bespoke settlement agreement with a live dispute behind it wants a person from the first line. Volume work is where this pays and it is honest about which is which.
It does not remove the need for bilingual lawyers
It removes the need for them to do the mechanical pass. The judgement they bring to the flagged lines is exactly the thing being protected, not replaced.