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Hello, everyone, and welcome back in this lesson, we're going to talk about another internationalization

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youth case, which is very similar to the plural youth case, where we have different alternative expressions

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that are going to be applied depending on the value of a numeric amount.

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Sometimes we have the same situation, but it's not necessarily in the context of a numeric amount.

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Let's give an example.

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If we switch over here to the Coast Guard component and we expect its template, we are going to notice

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that we have here different translatable expressions depending on the value of the course category properties.

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So we have heard the strings beginner, intermediate and advanced.

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Now, one way of getting this translated would be to add the eatin' end to each of these DVS so that

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each of the strings shows up in the extraction.

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But instead of doing this, we would like to do this in a way that would give the translator some more

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context about what is going on.

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Instead of seeing these free expressions as completely unrelated in the translator user interface,

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we would like these expressions to show up as being tightly linked and alternatives to one another.

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This is going to give the translator a lot more context about these terms to give that context to the

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translator.

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We are going to replace here the use of energy switch by an expression very similar to the plural expression

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that we wrote here.

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Let's then refactor our code in order to use these new ETN mechanism.

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We are going to move here to the use of the energy switch case clause.

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We're going to leave here the deal with class category and say that we are going to add a new internationalization

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expression.

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Let's add a couple of curly braces to the limit, the expression and let's apply here the N attribute.

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Now let's hear what is going to trigger our alternative choice in this case.

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We know that is going to be the category property of the course member variable.

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We are going to add here a comma and we are going to adhere here.

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The select keyword.

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These will indicate that this is a selection of alternative expressions.

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Next, we are going to start adding here the multiple cases that we have available for our expression.

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So first, we are going to say that whenever the course category variable contains the value beginner,

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in that case we are going to be bringing to the screen the following string after the Virginia case.

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We are going to be specifying here in a similar way the intermediate case for which we are going to

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output the value intermediate.

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And finally, we are going to apply here the advanced case for which we are going to write the string

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advanced.

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So here we have our expression completed.

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In order to see this expression in action, we are going to need a list containing courses with all

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the categories.

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So we are going to switch here to our application component and we are going to remove here the use

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of the filter by category pipe.

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Next, we are going to head over to our terminal and we are going to restart here Yanguas Clay, once

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we have our server up and running.

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If we try things out, we are going to see that we get an error and the blank screen.

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So it looks like our expression here was missing something.

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And what we are missing is a comma here after the select.

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So let's add that.

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Let's reload the application and let's confirm that everything is working correctly.

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So if we have a look here at our course list, we are going to see that there is something strange here

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with the first course.

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But the other courses we can see that we have here the label correctly displayed.

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So we can see this expression here is an alternative in some cases to engy switch with the advantage

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that it's compatible with the ETN extractor.

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Now, let's have a look at what could have happened here in this first course where we are getting here,

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this error.

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And if we expect the data, we are going to see that indeed we have here a situation where the category

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property of the course is missing.

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Let's then adhere to the category property.

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Let's set the category to intermediate.

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Now, if we were to lower the application, we are going to see that everything is working correctly

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as expected.

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So our alternative select expression is working.

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Let's now switch over here to the terminal.

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We are going to stop the angular clay and we are going to run our Aetate in an extractor.

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Now that the extraction is finished, let's have a look here at our messages file.

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If we open it, we are going to see that now.

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We have here another translation unit that is available here.

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So as you can see, our expression is here available with all the alternatives.

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So, again, this is going to be displayed in a user friendly way to the translator.

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And the translator will know that clearly these are alternative expressions.

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Let.

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Now simulate the translation process, we are going to simulate that we send this file to a translator.

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We're going to get a translated file and we are going to run the application in an alternative language.