אני עושה פחות ופחות טעויות באיות כשאני כותבת לאט.

כותבת is the feminine singular present form of לכתוב (to write).

So this sentence is being said by a female speaker:

• אני כותבת = I write / I am writing (female)
• A male speaker would say אני כותב

In Hebrew present tense, the verb often shows the speaker’s gender, even with אני.

That is a very common question.

With עשה (to do / make), the masculine and feminine singular present forms are usually written the same way without vowel marks:

• masculine: עוֹשֶׂה
• feminine: עוֹשָׂה

Without ניקוד, both are written עושה.

So the spelling does not tell you the gender here, but כותבת does. Because of כשאני כותבת, we know the speaker is female.

It means less and less or fewer and fewer.

Repeating the same word in Hebrew often gives this idea of a gradual change:

• פחות ופחות = less and less / fewer and fewer
• יותר ויותר = more and more

In this sentence, because טעויות means mistakes and is countable, natural English is:

• fewer and fewer mistakes

Hebrew does not make the same strict distinction that English does between less and fewer.

So פחות can be used with:

• uncountable nouns: פחות מים = less water
• countable nouns: פחות טעויות = fewer mistakes

So this is completely normal Hebrew.

באיות is ב + איות.

• איות = spelling
• ב־ often means in, with, or regarding, depending on context

So טעויות באיות literally means something like mistakes in spelling, and in natural English we usually say spelling mistakes.

It is perfectly understandable and correct.

But a very common expression is:

• שגיאות כתיב

That is probably the most standard phrase for spelling mistakes.

So:

• טעויות באיות = mistakes in spelling
• שגיאות כתיב = spelling mistakes

Both work, but שגיאות כתיב is especially common.

Because כש means when (or sometimes while), not if.

Here the sentence describes what happens when the speaker writes slowly:

• כשאני כותבת לאט = when I write slowly

If you said אם אני כותבת לאט, that would mean if I write slowly, which sounds more hypothetical.

The verbs עושה and כותבת are in the present tense.

But in Hebrew, the present tense can cover both:

• I do / I make
• I am doing / I am making
• I write
• I am writing

So Hebrew does not have a separate form like English am writing.

In this sentence, the meaning is probably habitual or general:

• I make fewer and fewer spelling mistakes when I write slowly

Usually, אני is helpful here and sounds natural.

In Hebrew present tense, the verb does not clearly show the person the way past and future often do. For example:

• כותבת tells you female singular, but not by itself whether it means I am writing, you are writing, or she is writing

So keeping אני makes the subject clear:

• אני עושה...
• כשאני כותבת...

In context, native speakers sometimes omit pronouns, but for learners it is best to keep אני here.

לאט means slowly, and placing it at the end is very natural in Hebrew:

• כשאני כותבת לאט = when I write slowly

Hebrew adverb placement is somewhat flexible, but this order is straightforward and idiomatic.

For example, this sentence could also be reordered:

• כשאני כותבת לאט, אני עושה פחות ופחות טעויות באיות.

That means the same thing.