<p>Thanks, I'm getting your point. I don't seem to find a way in the <a href="https://github.com/fnando/i18n-js/blob/master/app/assets/javascripts/i18n.js">I18n lib</a> to deal with missing variable names. I can only think about some crazy workarounds like the following (not tested) or even checking for <code>%{name}</code> in <code>I18n.t(TURN_INSTRUCTIONS[instCodes[0]]</code>. Maybe others have some better ideas to ease the transition phase without causing lots of work.</p>

<div class="highlight highlight-Javascript"><pre>            <span class="pl-k">var</span> name <span class="pl-k">=</span> s[<span class="pl-c1">1</span>] <span class="pl-k">?</span> <span class="pl-s"><span class="pl-pds">"</span><b><span class="pl-pds">"</span></span> <span class="pl-k">+</span> s[<span class="pl-c1">1</span>] <span class="pl-k">+</span> <span class="pl-s"><span class="pl-pds">"</span></b><span class="pl-pds">"</span></span> <span class="pl-k">:</span> I18n.t(<span class="pl-s"><span class="pl-pds">'</span>javascripts.directions.instructions.unnamed<span class="pl-pds">'</span></span>);
            <span class="pl-k">if</span> (instCodes[<span class="pl-c1">0</span>] <span class="pl-k">===</span> <span class="pl-s"><span class="pl-pds">"</span>11<span class="pl-pds">"</span></span> <span class="pl-k">&&</span> instCodes[<span class="pl-c1">1</span>]) {
              instText <span class="pl-k">+=</span> I18n.t(<span class="pl-s"><span class="pl-pds">'</span>javascripts.directions.instructions.roundabout_with_exit<span class="pl-pds">'</span></span>, { exit<span class="pl-k">:</span> instCodes[<span class="pl-c1">1</span>], name<span class="pl-k">:</span> name } );
            } <span class="pl-k">else</span> {
              <span class="pl-k">var</span> transl1 <span class="pl-k">=</span> I18n.t(<span class="pl-c1">TURN_INSTRUCTIONS</span>[instCodes[<span class="pl-c1">0</span>]], { name<span class="pl-k">:</span> name });
              <span class="pl-k">var</span> transl2 <span class="pl-k">=</span> I18n.t(<span class="pl-c1">TURN_INSTRUCTIONS</span>[instCodes[<span class="pl-c1">0</span>]]);
              <span class="pl-k">if</span> (transl1 <span class="pl-k">===</span> transl2) {           <span class="pl-c">// fallback to legacy mode where name variable is missing</span>
                instText <span class="pl-k">+=</span> transl2 <span class="pl-k">+</span> <span class="pl-s"><span class="pl-pds">"</span> <span class="pl-pds">"</span></span> <span class="pl-k">+</span> name;
              } 
             <span class="pl-k">else</span>
                instText <span class="pl-k">+=</span> transl1;
            }</pre></div>

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