Can somebody provide a full XSLT example of how to use Dictionaries and dictionary elements to localize a website?
I tried with something like this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet 
 version="1.0" 
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
 xmlns:msxml="urn:schemas-microsoft-com:xslt"
 xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:softpilar.library="urn:softpilar.library" xmlns:softpilar.web.localisation="urn:softpilar.web.localisation" xmlns:umbraco.contour="urn:umbraco.contour" 
 exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets softpilar.library softpilar.web.localisation umbraco.contour ">

<xsl:output method="xml" omit-xml-declaration="yes"/>

<xsl:param name="currentPage"/>
<xsl:variable name="key" select="/macro/key"/>
<xsl:variable name="currentLanguageCode" select="softpilar.library:GetCurrentLanguage()"/>

<xsl:template match="/">

<!-- start writing XSLT -->
<xsl:value-of select="softpilar.web.localisation:translate($key, $currentLanguageCode)"/>
 <!--<xsl:value-of select="$currentLanguageCode" />-->
</xsl:template>

</xsl:stylesheet>

I’m using version 4.5.1 and I’m getting the following error when I save my XSLT with the language in my browser set to English:

Error occured

System.ArgumentNullException: Value cannot be null. 
Parameter name: value 
at System.Web.Caching.CacheEntry..ctor(String key, Object value, CacheDependency dependency, CacheItemRemovedCallback onRemovedHandler, DateTime utcAbsoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, Boolean isPublic) 
at System.Web.Caching.CacheInternal.DoInsert(Boolean isPublic, String key, Object value, CacheDependency dependencies, DateTime utcAbsoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemoveCallback, Boolean replace) 
at System.Web.Caching.Cache.Add(String key, Object value, CacheDependency dependencies, DateTime absoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemoveCallback) 
at umbraco.cms.businesslogic.cache.Cache.GetCacheItem[TT](String cacheKey, Object syncLock, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem) 
at umbraco.cms.businesslogic.language.Language.GetByCultureCode(String CultureCode) 
at SoftPilar.Web.Localisation.DictionaryLookUp.translate(String key, String language)

Thanks in advance.