Vietnamese Diacritics in Content, Search and URLs
Vietnamese uses the Latin alphabet with many diacritics marking tones and vowel qualities, and accurate display matters to readers. Store all content in UTF-8 and use database collations that support Vietnamese sorting. Choose fonts with complete Vietnamese coverage, such as Be Vietnam Pro, Inter or Noto Sans, since some popular Latin fonts render the stacked accents poorly.
Search should treat queries with and without diacritics sensibly, because many users type without accents on mobile. Normalise text in your search index to support both. For URLs, convert titles into slugs without diacritics, replacing letters such as đ with d, so links stay readable when shared. Be careful with Unicode normalisation forms: text copied from different sources may use composed or decomposed characters that look identical but compare differently. Normalising to NFC before saving prevents duplicate entries and broken searches.
Connecting Zalo and Local Services to Your Vietnam Server
Zalo, built by a Vietnamese company, is an everyday messaging app for a very large number of people in the country, and many businesses use it for customer communication, order updates and support. A virtual server can host the webhook endpoints and integrations that connect your systems to official business accounts and mini apps.
Register through the Zalo developer platform, register a TLS-protected callback address hosted on your VPS, and respond to customer messages through the official APIs. Verify request authenticity and store access tokens securely, refreshing them as required. Local payment wallets and banking QR codes are also popular, and providers generally offer APIs for integration. Keep integration logic in a separate service or module so failures do not affect your main site. Monitor response times and errors, because slow replies on messaging platforms frustrate users quickly.
Choosing Between Hanoi and Ho Chi Minh City Geolocation
Vietnam's two major cities sit far apart, and networks have historically been organised around both. If your audience is concentrated in one region, choosing an address that geolocates nearby can help with local relevance and sometimes latency. For a national audience, either location usually works well.
Test before deciding. Use online ping tools from Hanoi, Da Nang and Ho Chi Minh City, or ask contacts in each to run tests to addresses in the listed range. Compare average latency and variation. Remember that geolocation databases can disagree, so check your assigned address with several services. Mention your preferred city to support when ordering if it matters for your project. Keep in mind that international connectivity from Vietnam can occasionally be affected by undersea cable issues, so serving local users from a local server provides valuable resilience.
Getting Ready for Tet Traffic in Vietnam
The Lunar New Year, Tet, is the biggest holiday in Vietnam, and online activity changes significantly around it. E-commerce sees heavy demand in the weeks before, as people buy gifts, food and travel tickets, followed by a quieter period during the holiday itself when many businesses close.
Plan server capacity ahead of the pre-Tet rush. Analyse past traffic, run load tests and optimise caching and database performance. Upgrade resources if needed, well before the peak. Schedule updates and maintenance for after the holiday rather than during the busy period. Make sure monitoring alerts reach someone available during the break, since many staff travel home. Prepare promotional pages in advance and test them under load. Set your server time zone to Asia/Ho_Chi_Minh, UTC+7, so scheduled campaigns launch at the correct local time.
