Language Translation in VisualForce Page | Translation Workbench

Salesforce offer functionality through that we'll be able to create single VF page which can be translated in several languages based on language/locale preference of current logged in user. We just need to upload the translation of all custom fields that you're going to use in VF page . To render the VF page in particular language, use Language attribute on <apex:page> tag.

Please follow below step to achieve the same. 

Step 1) Enable Translation Workbench and all Translation   Please follow below post to enable Translation Workbench
URL :-Translation Workbench - Salesforce ( Multilingual picklist values )

Step 2) You Can use the "Language" attribute of the VF page.

Step 3) Try to use Salesforce standard way to is to use apex:inputField tag with assigned sobject field. In this case a field will be generated automatically with respect to the current user language. 

Apex Class:-

public with sharing class TranslationWorkbenchController {
    public string selectedLang{get;set;}
    public List<selectoption> listOfLang {get;set;}
    public TranslationWorkbenchController(ApexPages.StandardController controller) {
        selectedLang='en';

        listOfLang = new List<selectOption>();
        listOfLang.add(new selectOption('en','English'));
        listOfLang.add(new selectOption('it','Italian'));
        listOfLang.add(new selectOption('es','Spanish'));
        listOfLang.add(new selectOption('de','German'));
        listOfLang.add(new selectOption('fr','French'));
    }
}

VF Page :-

<apex:page standardcontroller="Account" extensions="TranslationWorkbenchController" language="{!selectedLang}" >
<apex:form >

        <apex:selectList value="{!selectedLang}" size="1">
            <apex:selectoptions value="{!listOfLang}"/>
            <apex:actionsupport event="onchange"/>
        </apex:selectlist>
   
        <apex:pageblock >
            <apex:pageblocksection >
                <apex:inputfield value="{!Account.Name}"/>
                <apex:inputfield value="{!Account.Type}"/>
                <apex:inputfield value="{!Account.Industry}"/>
                <apex:inputfield value="{!Account.BillingCountry}"/>
            </apex:pageblocksection>
        </apex:pageblock>
   
</apex:form>
</apex:page>

Screen shot :-

English :-

Spanish:-

Thanks
Amit Chaudhary