Speaking in Spanish about `intent=':unit'` is not entirely correct

[pablgonz]

First of all, thank you very much for your contribution. Thanks to the LaTeX team for adding the \MathMLintent command, I can now test several things, including the units of measurement I commonly use.

I developed the test using MathCATDemo and Firefox (I'm not using NVDA for now), I'll focus on using $$1 \mathrm{km}^2$$ as a base example which generates the following output:

<math xmlns="http://www.w3.org/1998/Math/MathML">
 <mn>1</mn>
 <mspace width="0.167em"/>
 <msup>
 <mi intent=":unit" mathvariant="normal">
 km
 </mi>
 <mn>2</mn>
 </msup>
</math>

When using SimpleSpeak/Terse/Medium the output is correct:

1 kilómetro al cuadrado

But when switching to SimpleSpeak/Verbose, the output is:

1 kilómetro elevado al cuadrado

which is incorrect in Spanish and should say:

1 kilómetro elevado a 2

When using ClearSpeak/Terse/Medium/Verbose the output is correct:

1 kilómetro cuadrado

But in Spanish, 1 is singular and 0, 2, 3, etc. are plural, so an s must be added to the word cuadrado. If I modify the example to:

<math xmlns="http://www.w3.org/1998/Math/MathML">
 <mn>2</mn>
 <mspace width="0.167em"/>
 <msup>
 <mi intent=":unit" mathvariant="normal">
 km
 </mi>
 <mn>2</mn>
 </msup>
</math>

Using ClearSpeak/Terse/Medium/Verbose the output is:

2 kilómetros cuadrado

and the correct thing would be:

2 kilómetros cuadrados

The same applies to the rest of the units of measurement that I provided. Now, if we modify the input to $$1 \mathrm{km}^3$$:

<math xmlns="http://www.w3.org/1998/Math/MathML">
 <mn>1</mn>
 <mspace width="0.167em"/>
 <msup>
 <mi intent=":unit" mathvariant="normal">
 km
 </mi>
 <mn>3</mn>
 </msup>
</math>

When using SimpleSpeak/Terse/Medium/Verbose the output is:

1 kilómetro cúbica

Which is incorrect and in Spanish (Terse/Medium) and the correct one (maintaining the output style provided by $$\mathrm{km}^2$$) it should say:

1 kilómetro al cubo

and (Verbose)

1 kilómetro elevado a 3

Using ClearSpeak/Terse/Medium/Verbose the output is:

1 kilómetro al cubo

and it should be (maintaining the output style provided by $$\mathrm{km}^2$$):

1 kilómetro cúbico

And considering that 1 is singular and 0, 2, 3, etc. are plural, then it must be modified a little ($$2 \mathrm{km}^3$$):

2 kilómetros cúbicos

To summarize, the reading could be standardized (same style) for $$\mathrm{km}^2$$ and $$\mathrm{km}^3$$, and also (I think) SimpleSpeak/Terse should be equal to ClearSpeak in this case.

With higher-order powers (4, 5, ...) the issue is similar and the reading sounds a bit strange, I will modify the example to $$\mathrm{km}^4$$:

<math xmlns="http://www.w3.org/1998/Math/MathML">
 <mn>1</mn>
 <mspace width="0.167em"/>
 <msup>
 <mi intent=":unit" mathvariant="normal">
 km
 </mi>
 <mn>4</mn>
 </msup>
</math>

When using ClearSpeak/Terse/Medium/Verbose the output is:

1 kilómetro a la cuarto potencia

Which is incorrect (it should say "cuarta" not "cuarto") and sounds quite strange. It's natural that he would say:

1 kilómetro a la cuarta

or

1 kilómetro elevado a 4

When using SimpleSpeak/Terse/Medium/Verbose the output is:

1 kilómetro a la cuarto

Which again is wrong, for SimpleSpeak/Terse/Medium, It's natural that he would say:

1 kilómetro a la cuarta

or

1 kilómetro elevado a 4

and for SimpleSpeak/Verbose say:

1 kilómetro elevado a la cuarta potencia

However, using "cuarta potencia, quinta potencia, sexta potencia,..." is not common and "elevado a ..." is preferred.

I hope this report is helpful...Thanks again