I just had a look at your site. I check the translation from English to dutch. If i look at the menu to the right it seems to confirm the same issue i had. Mind you, the first word of the sentence DOES get recognised for some odd reason like on my own site.
Producten & Supplies <--- Supplies is with an S
text in mid:
Vanuit onze basis in Falmouth Docks, UK dekken we de South West Britse havens naar nationale en internationale bestemmingen. <-- South West ( in dutch we type it with a small letter --> zuid west. English i believe uses a capital.
Bonded Stores / Marine Vlaggen / BA Grafieken & Admiralty Publicaties / Marine Oils /Cabine, Pantry & Galley Stores / Marine Verven & Vernissen / Dek en Motor Stores / Medisch Logistiek & Port Services Bepalingen Marine Chemicals Wilhelmsen Ships Equipment <-- all words that do not get translated have capital letters. As you have noticed .. some do get translated with capital letters. It is almost as if the programmer got tired of following through on the capital letters.
Your contact form probably uses a field TPL recogniser in its .php .. if so it needs to be edited manually from your side. Look for the language .ini file
Perhaps this will stimulate you to have a look at it again
In the meantime back to my problem .. sigh.